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 feature:
- Smooth and quiet operation
- Essentially zero leak
- Dirt tolerant design
- Immune to silting
- Very fast response time
Will accept maximum pressure at port 2; suitable for use in cross port relief circuits. The seals on the adjust screw are exposed to system pressure which means this valve can only be adjusted when the pressure is removed. The setting procedure is: check the setting, remove the pressure, adjust the valve, check the new setting.
Valve is relatively insensitive to varying oil temperatures and oil borne contamination. Select a spring range where the desired relief setting is approximately mid-range to high between the minimum and maximum pressure to ensure maximum valve repeatability.
Additional Technical Specifications:
- Suitable for use in load holding applications
- Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio
- 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
- Test pressure ranges: A (2000 psi), B (1000 psi), C (4000 psi), D (800 psi), E (400 psi), S (150 psi), W (3000 psi)
Reseat meets or exceeds 85% of crack pressure at test setting. Settings lower than the test pressure may result in lower reseat percentages. 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.
Q: Do you accept small orders?
A: We accept small orders. Please feel free to contact us for more information.
Q: Can you ship to my country?
A: Yes, we can ship internationally. If you don't have your own shipping forwarder, we can assist you.
Q: What are your payment terms?
A: We accept T/T, LC at sight, or 100% full payment.
Q: What is your production lead time?
A: Lead time depends on product and order quantity. Typically 15 days for MOQ quantities.
Q: When can I get a quotation?
A: We typically respond within 24 hours. For urgent requests, please call or note in your email.
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