Sun hydraulic

FLeX Series 2-way, 2-stage, solenoid-operated directional poppet valve with reverse flow check - flow 2-1. DFBF. 10 gpm. 40 L/min. T-162A. Normally Closed | Open. FLeX Series 2-way, 2-stage, solenoid-operated directional poppet valve with reverse flow check - flow 2-1, 3000 psi (210 bar) DFBE. 10 gpm. Technical Features [ + ] Needle valves are fully adjustable orifices used to regulate flow. They are infinitely adjustable from fully closed up to the maximum orifice diameter. They are not pressure compensated and may be used as flow controls or as shutoff valves. All 2-port flow control cartridges are physically and functionally ...Sun Hydraulics is a leading manufacturer of high-quality electro-hydraulic products, such as cartridges, manifolds, electronics and accessories. Explore their new products, …Seals: Materials of Construction. Sun Hydraulics' cartridge valve seals (and manifold/body gaskets when present) are offered in the following customer-specified material choices: 70-durometer, B46-70 (31.5% Nitrile) or N470 (30-31% Nitrile) or equivalent. Manufacturer's temperature range rating: -22° to 230° F (-30° to 110° C)Anodizing an aluminum manifold grossly reduces the fatigue life by anywhere from 20% to 50%. Important: Carefully consider the maximum system pressure. The pressure rating of the manifold is dependent on the manifold material, with the port type/size a secondary consideration. Manifolds constructed of aluminum are not rated for pressures higher ...Long before Sun Hydraulics was founded, pilot-to-open check valves were ubiquitous in the industry. This predates cartridge valves with parts-in-bodies assemblies. These often times have an ‘”adjust screw” to manually release a load by pushing a check ball off of a seat by turning the adjust screw clockwise into the valve. When Bob Koski ...Sun Hydraulics is a leading designer and manufacturer of high performance screw-in hydraulic cartridge valves and manifolds. Their products control force, speed and motion …Sun Hydraulics is a leading designer and manufacturer of high performance screw-in hydraulic cartridge valves and manifolds. Their products control force, speed and motion …Sun hydraulicics is a combination of the hydraulic systems used to power plants with hydrauliconic. The price of sun hydraulicics varies depending on the usage ...This solenoid-operated 2-way, 2-position cartridge is a direct-acting, balanced spool directional valve. The valve is available in either a normally open or normally closed configuration. The solenoid tube assembly is fatigue rated for 5000 psi (350 bar) service. This valve is direct actuated and requires no minimum hydraulic pressure for ... The minimum pressure to pilot open a CKCB XCN, which is a 30 psi (2 bar) cracking pressure, is about 45 psi (3 bar). To open a pilot-to-open check valve with 3000 psi (210 bar) at port 1, 1045 psi (72 bar) of pilot pressure is required at port 3; this equates to a 2.9:1 effective pilot ratio. Sun Hydraulics Technical Tips 4 · Tech Tips:Web# 999-901-365 Rev. 16JUN14© 2014 Sun Hydraulics Corporation All Sun cavity drawings specify a “Drill/Reamer Relationship” of 1/32 (0,8 mm) of an inch. (See Figure 3.) Specifically, the form reamer should be inserted 1/32 of an inch deeper thanTechnical Features [ + ] These unbalanced poppet, logic valves are 2-way switching elements that are spring-biased closed. Pressure at either work port 1 or 2 will further bias the valve to the closed position while pressure at port 3 will tend to open it. The force generated at port 3 must be greater than the sum of the forces acting at port 1 ...QuickDesign™ Updates. We Know You'll Love. QuickDesign™ has some new features! If it has been a while or you are a new user, we invite you to give Sun's QuickDesign™ a spin. Taimi Cartridge Swivel Fittings now available! Designed to be integrated directly into hydraulic manifolds, Taimi Swivels are now configurable in custom integrated ... The minimum pressure to pilot open a CKCB XCN, which is a 30 psi (2 bar) cracking pressure, is about 45 psi (3 bar). To open a pilot-to-open check valve with 3000 psi (210 bar) at port 1, 1045 psi (72 bar) of pilot pressure is required at port 3; this equates to a 2.9:1 effective pilot ratio. Lowercase characters of European languages (a through z, sharp-s, with diacritic marks, Greek and Cyrillic characters) Base 10 digits (0 through 9) Nonalphanumeric characters: @~!#$%^&* ()_. {}|,`:; Any Unicode character that is categorized as an alphabetic character but is not uppercase or lowercase. This includes Unicode characters from Asian ...Long before Sun Hydraulics was founded, pilot-to-open check valves were ubiquitous in the industry. This predates cartridge valves with parts-in-bodies assemblies. These often times have an ‘”adjust screw” to manually release a load by pushing a check ball off of a seat by turning the adjust screw clockwise into the valve. When Bob Koski ...Why do freckles come out in the sun? Visit HowStuffWorks to learn why freckles come out in the sun. Advertisement If you have freckles, you've probably noticed that a long day in t...Sun Hydraulics reducing cartridges are available in five sizes, with flow rates up to 80 gpm (320 L/min.). Functionally interchangeable with reducing/relieving cartridges (same flow path, same cavity for a given frame size) Fully adjustable up to and including 4500 psi (315 bar) with inlet pressures up to 5000 psi (350 bar) except air-piloted versionsThere are many types of hydraulic machines that include large machinery, such as backhoes and cranes. Other types of smaller equipment include log-splitters and jacks. The brake on...This video demonstrates the phenomenon of sonoluminescence and the resulting cavity erosion in hydraulic systems.Fixed-orifice, flow fuse valve. Flow fuse cartridges are used to maintain the position of a hydraulic actuator in the event of a hose or line break. The valve allows flow to and from the actuator but closes instantly if flow from the actuator exceeds the setting of the valve. NOTE: Because the valve responds so rapidly, it is sensitive to any ...The minimum pressure to pilot open a CKCB XCN, which is a 30 psi (2 bar) cracking pressure, is about 45 psi (3 bar). To open a pilot-to-open check valve with 3000 psi (210 bar) at port 1, 1045 psi (72 bar) of pilot pressure is required at port 3; this equates to a 2.9:1 effective pilot ratio. This solenoid-operated 2-way, 2-position cartridge is a direct-acting, balanced spool directional valve. The valve is available in either a normally open or normally closed configuration. The solenoid tube assembly is fatigue rated for 5000 psi (350 bar) service. This valve is direct actuated and requires no minimum hydraulic pressure for ... Sun Hydraulics是世界领先的高性能液压螺纹插装阀以及集成阀块的设计和制造公司，产品集成在流体动力系统中，用以实现力，速度和运动的控制。. Sun公司于1970年成立于美国，1997年在纳斯达克上市，股票代码SNHY。. Sun通过全球的分销商网络提供产品和服务，产品 ... Sun Hydraulics check valves feature high flow capacity relative to a small physical size. Available with free flow from port 1 to port 2 or port 2 to port 1 Available in three-port versions with port 3 blocked Capable of operating at pressures up to 5000 psi (350 bar) Available with flow capacities up to 160 gpm (600 L/min.) Some common viscosity grades for hydraulic oil include 10, 32, 46 and 68. The viscosity of hydraulic oil is usually referred to as the fluid’s International Standards Organization ...Sun's load reactive and non-load reactive, load control valves complement our existing line of motion control products, sharing the same cavities as CB**, CA** and CW** counterbalance valves. Feature low leakage with excellent modulation characteristics Available in adjustable and fixed setting versions Can be installed directly into a cavity …Sun Hydraulics offers a range of solenoid-operated relief valves and coils for pressure control, load control, flow control and sequence control in hydraulic systems. The FLeX Series features a 2-stage, field adjustable design with ventable and blockable relief functions, and the 740 Series and 747 Series have high-power and explosion-proof options. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast. A remote pilot relief on port 3 (vent) will control the valve below its own setting. Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. If used in cross port relief circuits, consider spool leakage.Sun Hydraulics has launched its new Sun FLeX™ family of competitively priced, high-performance electro-hydraulic products. These 25 completely new solenoid-operated cartridge valves, available in directional, electro-proportional and relief functions, and three new coils are the first products in the FLeX Series for mobile and industrial hydraulics markets. This manually operated, 2-position, 2-way directional cartridge is a direct-acting, poppet-style valve used to control the direction of flow in a hydraulic circuit. The valve is available in either a normally open or normally …Low side, 3-position, hot oil shuttle valve. Low-side (hot oil) shuttle cartridges allow hot oil to be diverted from the low pressure side of a closed loop system. When both work ports (ports 2 and 4) are at equal pressures the valve is spring-centered to an all-ports-blocked position. When one of the work ports (port 2 or 4) sees a higher ...Technical Features [ + ] Needle valves are fully adjustable orifices used to regulate flow. They are infinitely adjustable from fully closed up to the maximum orifice diameter. They are not pressure compensated and may be used as flow controls or as shutoff valves. All 2-port flow control cartridges are physically and functionally ...Flow divider-combiner Cartridges. Generate PDF. 22 Matching ModelsSome common viscosity grades for hydraulic oil include 10, 32, 46 and 68. The viscosity of hydraulic oil is usually referred to as the fluid’s International Standards Organization ...Technical Features [ + ] Needle valves are fully adjustable orifices used to regulate flow. They are infinitely adjustable from fully closed up to the maximum orifice diameter. They are not pressure compensated and may be used as flow controls or as shutoff valves. All 2-port flow control cartridges are physically and functionally ...Long before Sun Hydraulics was founded, pilot-to-open check valves were ubiquitous in the industry. This predates cartridge valves with parts-in-bodies assemblies. These often times have an ‘”adjust screw” to manually release a load by pushing a check ball off of a seat by turning the adjust screw clockwise into the valve. Fully adjustable, pressure-compensated flow controls with reverse-flow check provide precise flow regulation for meter-in or meter-out applications where there may be wide …To increase corrosion resistance. Sun uses 6061-T651 aluminum. It is one of the most corrosion resistant aluminum alloys there is. Whether or not anodizing improves the corrosion resistance of 6061 aluminum is debatable. We have yet to have a manifold returned because of corrosion. Appearance (color).The capacity of side-to-nose (port 2 to port 1) 2-port check valves is approximately 30% less than preferred models with a nose-to-side (port 1 to port 2) flow path. Check valves offer extremely low leakage rates with a maximum leakage of less than 1 drop per minute (0,07 cc/min). Will accept 5000 psi (350 bar) at ports 1 and 2.Sun offers a variety of electro-proportional cartridges comprised of both direct-acting and pilot-operated versions. The direct-acting versions consist of proportional flow control, reducing/relieving and the T-8A pilot stage relief models. Long before Sun Hydraulics was founded, pilot-to-open check valves were ubiquitous in the industry. This predates cartridge valves with parts-in-bodies assemblies. These often times have an ‘”adjust screw” to manually release a load by pushing a check ball off of a seat by turning the adjust screw clockwise into the valve. This valve is a pilot to open check valve. It has a sealed pilot, a steel seat, and is vented. It allows free flow from the valve (port 2) to the load (port 1) and blocks flow in the opposite direction. Pressure at the pilot (port 3) pilot port will open the valve from port 1 to port 2. Pilot pressure needed to open the valve is directly ... Sun Hydraulics maintains a strong commitment to innovation, quality manufacturing, and customer partnerships, reflecting its core values of openness, commitment, innovation, …Sun’s newly named Koski Center serves as the global headquarters of the company’s R&D efforts. It provides expanded hydraulics and electro-hydraulics testing capabilities intended to serve the company's own product innovation and development efforts and to support its global OEM customers, testing the latest technologies and Sun solutions for their machines and equipment. Pilot-to-close check valve. This valve is a spring biased closed, pilot-to-close check cartridge that has a 1.8:1 pilot ratio. The valve allows flow from port 1 to port 2 and blocks reverse flow. Pressure at the pilot port opposes pressure at port 1 at a ratio of 1.8:1. This valve is most often used in regeneration circuits. Dither should be adjustable between 100 - 250 Hz. This cartridge utilizes 740 Series low-power and high-power coils, and 747 Series hazardous location coils. This valve is fully compatible with the XMD Expandable Mobile Drivers from Sun. The preferred mounting configuration is horizontal or vertically with the coil down.If abrasive particles enter a hydraulic system, they can damage expensive components like pumps and motors. These contaminating particles may even prevent hydraulic components from operating properly by causing them to respond slowly or stick open. Sun filter cartridges trap and remove these particles to help prevent premature component wear …To increase corrosion resistance. Sun uses 6061-T651 aluminum. It is one of the most corrosion resistant aluminum alloys there is. Whether or not anodizing improves the corrosion resistance of 6061 aluminum is debatable. We have yet to have a manifold returned because of corrosion. Appearance (color).These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast. A remote pilot relief on port 3 (vent) will control the valve below its own setting. Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. If used in cross port relief circuits, consider spool leakage.Low side, 3-position, hot oil shuttle valve. Low-side (hot oil) shuttle cartridges allow hot oil to be diverted from the low pressure side of a closed loop system. When both work ports (ports 2 and 4) are at equal pressures the valve is spring-centered to an all-ports-blocked position. When one of the work ports (port 2 or 4) sees a higher ...SARASOTA, Fla.-- (BUSINESS WIRE)-- Sun Hydraulics Corporation (Nasdaq:SNHY) (“SNHY” or the “Company”), a global industrial technology leader that …4-way, 3-position, solenoid-operated directional spool valve, 3600 psi (250 bar) - common cavity. This direct acting, solenoid-operated, 4-way, 3-position spool valve is spring centered to the neutral position. When coil A is energized, the flow is from port 3 (P) to port 2 (B) and from port 4 (A) to port 1 (T). Sun Hydraulics is a leading manufacturer of high-quality electro-hydraulic products, such as cartridges, manifolds, electronics and accessories. Explore their new products, solutions and highlights, and learn how to design your own custom solutions with QuickDesign. SKÅNES FAGERHULT, Sweden, June 3, 2020 /PRNewswire/ -- After announcing last year Concentric AB had successfully won five electro-hydraulic steeri... SKÅNES FAGERHULT, Sweden, June...Anodizing an aluminum manifold grossly reduces the fatigue life by anywhere from 20% to 50%. Important: Carefully consider the maximum system pressure. The pressure rating of the manifold is dependent on the manifold material, with the port type/size a secondary consideration. Manifolds constructed of aluminum are not rated for pressures higher ...2-way, direct-acting electro-proportional, pressure compensated flow control valve with reverse flow check. FDEP. 30 gpm. 120 L/min. T-16A. FLeX Series 3-way, direct-acting, electro-proportional, bypass/restrictive, priority flow control valve. FREP. 30 gpm.The minimum pressure to pilot open a CKCB XCN, which is a 30 psi (2 bar) cracking pressure, is about 45 psi (3 bar). To open a pilot-to-open check valve with 3000 psi (210 bar) at port 1, 1045 psi (72 bar) of pilot pressure is required at port 3; this equates to a 2.9:1 effective pilot ratio. To increase corrosion resistance. Sun uses 6061-T651 aluminum. It is one of the most corrosion resistant aluminum alloys there is. Whether or not anodizing improves the corrosion resistance of 6061 aluminum is debatable. We have yet to have a manifold returned because of corrosion. Appearance (color). The 2 colors that would appeal to …In the year 1970 we began as trailblazers. Everything about the company—from how we engineer, manufacture and distribute products to the way we foster leadership and collaboration—was ahead of its time. And 50 years later, it still is. See for yourself by exploring through our company history pages. 1970 - 1979. When it comes to hydraulic cylinder repair, understanding the factors that influence the cost is crucial. Hydraulic cylinders are essential components in various industries, includ...FLeX Series 2-stage, solenoid-operated adjustable relief valve, energize to vent. RVCL. 25 gpm. 95 L/min. T-10A. FLeX Series 2-stage, solenoid-operated adjustable relief valve, normally blocked. RVCN. 25 gpm.Port 1 to 2 open, port 3 blocked cavity plug. This cavity plug allows ports 1 and 2 to remain open and blocks port 3. Corrosion resistant cavity plugs are intended for use in corrosive environments and are identified by the model code suffix /AP (see CONFIGURATION section). The bodies of these plugs are made from high strength lean duplex ...As the industry leader in counterbalance solutions, Sun Hydraulics offers more than 150 standard counterbalance models in a range of capacities, pilot ratios and configurations. The proven CB** family of valves leverages a proven poppet-and-piston design suitable for most general applications and provides precise, reliable load holding and ... One of the technologies that have made the industrial lifting and moving of loads many times safer is hydraulics. The movement of heavy loads is a challenging but necessary require...2 caveats: (1) If the valve is in the reducing mode and you suddenly reverse the flow, the valve will not have time to open and will shift into relieving mode or (2) If the back flow generates a pressure drop through the valve that exceeds the setting, the valve will shift into the relieving mode. When in doubt, use a reverse flow check.Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot-operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust. Pilot-to-close check valve. This valve is a spring biased closed, pilot-to-close check cartridge that has a 1.8:1 pilot ratio. The valve allows flow from port 1 to port 2 and blocks reverse flow. Pressure at the pilot port opposes pressure at port 1 at a ratio of 1.8:1. This valve is most often used in regeneration circuits.Some common viscosity grades for hydraulic oil include 10, 32, 46 and 68. The viscosity of hydraulic oil is usually referred to as the fluid’s International Standards Organization ...Direct-acting relief cartridges are normally closed, pressure-limiting valves used to protect hydraulic components from pressure transients. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to limit the pressure rise. These valves are smooth and quiet, essentially zero ...Generate PDF. FLeX Series 3-way, solenoid-operated directional spool valve - 3000 psi (210 bar) FLeX Series 3-way, solenoid-operated directional spool valve. FLeX Series 4-way, 2-position, solenoid-operated directional spool valve - 3000 psi (210 bar) FLeX Series 3-way, direct-acting, solenoid-operated directional blocking poppet valve. Technical Features [ + ] These unbalanced poppet, logic valves are 2-way switching elements that are spring-biased closed. Pressure at either work port 1 or 2 will further bias the valve to the closed position while pressure at port 3 will tend to open it. The force generated at port 3 must be greater than the sum of the forces acting at port 1 ...Welcome to Sun Hydraulics LLC StoreFront. If you are a current Sun Hydraulics LLC Customer, please contact ... Feel Your Best Under Pressure with Sun Carrying the Load. …Long before Sun Hydraulics was founded, pilot-to-open check valves were ubiquitous in the industry. This predates cartridge valves with parts-in-bodies assemblies. These often times have an ‘”adjust screw” to manually release a load by pushing a check ball off of a seat by turning the adjust screw clockwise into the valve. Reasons to anodize: To increase corrosion resistance. Sun uses 6061-T651 aluminum. It is one of the most corrosion resistant aluminum alloys there is. Whether or not anodizing improves the corrosion resistance of 6061 aluminum is debatable. We have yet to have a manifold returned because of corrosion. Appearance (color).Direct-acting relief cartridges are normally closed, pressure-limiting valves used to protect hydraulic components from pressure transients. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to limit the pressure rise. These valves are smooth and quiet, essentially zero ...In the year 1970 we began as trailblazers. Everything about the company—from how we engineer, manufacture and distribute products to the way we foster leadership and collaboration—was ahead of its time. And 50 years later, it still is. See for yourself by exploring through our company history pages. 1970 - 1979. In the year 1970 we began as trailblazers. Everything about the company—from how we engineer, manufacture and distribute products to the way we foster leadership and collaboration—was ahead of its time. And 50 years later, it still is. See for yourself by exploring through our company history pages. 1970 - 1979. Long before Sun Hydraulics was founded, pilot-to-open check valves were ubiquitous in the industry. This predates cartridge valves with parts-in-bodies assemblies. These often times have an ‘”adjust screw” to manually release a load by pushing a check ball off of a seat by turning the adjust screw clockwise into the valve. When Bob Koski ...Hydraulic and pneumatic. SUN Series CBBL Hydraulic Relief Valve. Ask us. SUN Hydraulic Relief Valve CBBL Series.The definition of hydraulic pressure is that of a force per unit area that is measured in pounds per square inch (PSI). Dynamic pressure and static pressure are the two pressure co...Sun Hydraulics · the use of several standard sockets for all types of valves, · use of five valve sizes with high unification of spare parts, · reliability and...Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals. These valves are hydraulically balanced between port 1 and port 2. All ports will accept 5000 psi (350 bar). Incorporates the Sun floating style construction to minimize the ... Long before Sun Hydraulics was founded, pilot-to-open check valves were ubiquitous in the industry. This predates cartridge valves with parts-in-bodies assemblies. These often times have an ‘”adjust screw” to manually release a load by pushing a check ball off of a seat by turning the adjust screw clockwise into the valve. When Bob Koski ...When it comes to hydraulic systems, selecting the right hoses and fittings is crucial for ensuring optimal performance and safety. However, there are several common mistakes that p...Sun Hydraulics provides a variety of solenoid and non-solenoid directional control cartridges that include 2-, 3- and 4-way configurations. Pilot-operated and direct-acting 2- and 3-way cartridges use the same cavity; Six-port pilot-operated cartridges; 2-, 3- and 4-way solenoid cartridges with an industrial-grade solenoid Manufacturing Sun Cartridge Cavities (522.27 KB) Technical Information. Removing Valves from Ductile Manifolds (73.96 KB) Manifolds: Materials of Construction. QuickDesign & SunDesign: Sun's 3- & 5-Axis Solutions. Custom Integrated Packages from Sun. Sun Model Code Explanation; 999-901-334 (343.9 KB) Seal Kit Installation Guidelines. All 2-port relief cartridges (except pilot reliefs) are physically and functionally interchangeable (same flow path, same cavity for a given frame size). Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge machining variations.This electro-proportional, direct-acting reducer/reliever valve reduces a high primary pressure at the inlet (port 2) to a constant reduced pressure at port 1, with a full flow relief function from port 1 to tank (port 3). The valve is biased to the relieving mode. Energizing the coil connects port 2 to port 1.Symbol Description Model Capacity Cavity : 4-way, 3-position, electro-proportional, solenoid-operated directional valve, 3600 psi (250 bar) - common cavity Fixed-orifice, flow fuse valve. Flow fuse cartridges are used to maintain the position of a hydraulic actuator in the event of a hose or line break. The valve allows flow to and from the actuator but closes instantly if flow from the actuator exceeds the setting of the valve. NOTE: Because the valve responds so rapidly, it is sensitive to any ...Sun Hydraulics is a leading manufacturer of high-quality electro-hydraulic products, such as cartridges, manifolds, electronics and accessories. Explore their new products, solutions and highlights, and learn how to design your own custom solutions with QuickDesign. 3-way, solenoid-operated directional spool valve. This solenoid-operated 3-way, 2-position cartridge is a direct-acting, balanced spool directional valve. The solenoid tube assembly is fatigue rated for 5000 psi (350 bar) service. Spools B and R are closed in the transition between their two positions. This results in a higher performance limit ... FLeX Series relief valves are fully compatible with the XMD Expandable Mobile Drivers from Sun. Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage the seals. Designed and tested to 10-million operational cycles at full-rated pressure.Symbol Description Model Capacity Cavity : 4-way, 3-position, electro-proportional, solenoid-operated directional valve, 3600 psi (250 bar) - common cavity These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast. A remote pilot relief on port 3 (vent) will control the valve below its own setting. Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. If used in cross port relief circuits, consider spool leakage.Your QuickPrint Catalogue is generated on demand based on your product selection. Process time depends on the models selected and the resulting file size.Malaysia #1 hydraulics equipment specialist with products which are ISO9001:2000 certified and tested according to ASME B 30.1 standard.Attention! We are not official Sun Hydraulics dealers and we don't represent it. pump. Hydraulic Pumps · pump. Hydraulic Valves · pump. Hydraulic Cartridges ...Pilot-operated, balanced-poppet relief cartridges are normally closed pressure regulating valves. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to regulate the pressure. These valves are accurate, smooth, quiet, fast, and have low pressure rise vs. flow. | Cpyssu (article) | Mnwgle.