Model: RSDS8
Pilot-operated, balanced poppet sequence main stage with integral T-8A control cavity
Cavity: T-11A | Capacity:
Technical specifications
This valve is a normally closed poppet element that incorporates an integral pilot control cavity. It is externally drained, and is a balanced poppet design. The pilot control cavity will accept any T-8A pressure control cartridge. When the pressure at the inlet (port 1) reaches the pilot control cartridge's setting, the poppet element starts to open to port 2, throttling flow to regulate the pressure. The pilot cartridge's setting determines the difference in pressure between the inlet (port 1) and the drain (port 3). These valves are insensitive to back pressure at port 2, up to the valve setting. They may be used to regulate pressure in place of 2-port relief valves if there is pressure in the return line.
- All 3 port sequence cartridges are physically and functionally interchangeable (i.e. same flow path, same cavity for a given frame size).
- Pilot flow continues to increase as the pressure at port 1 (inlet), relative to the pressure at port 3 (drain), rises above the valve setting.
- The main stage orifice is protected by a 150 micron stainless steel screen.
- Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).
- NOTE: With the -8 control option, the main stage valve should first be installed to the correct torque value. The T-8A pilot control valve should then be installed into the main stage valve to its required torque value.
- Because the modulating occurs inside the cartridge these valves are immune to most of the problems associated with cavitation, namely noise and manifold erosion.
- Will accept maximum pressure at port 2; suitable for use in cross port relief circuits.
- 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.
- Cavity
- Series
- Capacity15 gpm
- Maximum Operating Pressure5000 psi
- Control Pilot Flow7 - 10 in³/min.
- Main stage leakage at reseat10 drops/min.
- Pilot Control CavityT-8A
- Pilot Control Valve Hex Size7/8 in.
- Pilot Control Valve Installation Torque20 - 25 lbf ft
- Response Time - Typical10 ms
- Valve Hex Size7/8 in.
- Valve Installation Torque30 - 35 lbf ft
- Model Weight.30 lb
- Seal kit - Cartridge
- Seal kit - Cartridge
- Seal kit - Cartridge
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- Compound cartridge (pilot and main stage) assembly information is provided for reference only. Cartridges must be ordered separately and assembled at point of use.
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Technical Information
- RSDS Pilot-operated, balanced poppet sequence valve