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Pilot-to-close, spring-biased closed, unbalanced poppet logic element with pilot source from port 1 or 2
Cavity: T-17A | Capacity:
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Technical specifications
These unbalanced, pilot-to-close logic valves are 2-way switching elements that are spring biased closed. Pressure at either work port 1 or 2 will oppose the spring and tend to open the valve while pressure at port 3 will tend to close it. The force generated at port 3, plus the spring force, must be greater than the sum of the forces acting at port 1 and port 2 for the valve to remain closed. NOTE: The pilot area (port 3) is 1.8 times the area at port 1 and 2.25 times the area at port 2.
- These valves have positive seals between port 2 and the pilot area.
- Because these valves are unbalanced, operation is pressure dependent. Opening and closing of the poppet are functions of the force balances on three areas: Port 1 = 100%, Port 2 = 80%, and the Pilot Area = 180%.
- These valves are pressure responsive at all ports, therefore it is essential to consider all aspects of system operation through a complete cycle. Pressure changes at any one port may cause a valve to switch from a closed to an open position, or vice versa. All possible pressure changes in the complete circuit must be considered to assure a safe, functional system design.
- All ports will accept 5000 psi (350 bar).
- 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
- Capacity100 gpm
- Maximum Operating Pressure5000 psi
- Area Ratio, A3 to A11.8:1
- Area Ratio, A3 to A22.25:1
- Control Orifice Diameter.031 in.
- Maximum Valve Leakage at 110 SUS (24 cSt)10 drops/min.
- Pilot Volume Displacement.25 in³
- Valve Hex Size1 1/4 in.
- Valve Installation Torque150 - 160 lbf ft
- Model Weight1.10 lb
- Seal kit - Cartridge
- Seal kit - Cartridge
- Seal kit - Cartridge
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