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Pilot-to-close, spring-biased open, unbalanced poppet logic element with position switch
Cavity: T-2A | Capacity:
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Technical specifications
These unbalanced, pilot-to-close logic valves are 2-way switching elements that are spring biased open. Pressure at either work port 1 or 2 will tend to keep the valve open while pressure at port 3 will tend to close it. The force generated at port 3 must be greater than the sum of the forces acting at port 1 and port 2 plus the spring force for the valve to close. NOTE: The pilot area (port 3) is 1.8 times the area at port 1 and 2.25 times the area at port 2. This valve incorporates a position switch to provide confirmation that the valve is spring biased to the fully open position.
- These valves have positive seals between port 2 and the pilot area.
- This cartridge is supplied as a sealed, factory set unit and is not field serviceable. Any tampering will violate the product warranty.
- When torquing this cartridge into its cavity, a crow's foot wrench or similar will be required since the position switch precludes the use of a deep socket wrench.
- 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).
- Position switch is CE approved.
- 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
- Capacity50 gpm
- Maximum Operating Pressure5000 psi
- Area Ratio, A3 to A11.8:1
- Area Ratio, A3 to A22.25:1
- Maximum Valve Leakage at 110 SUS (24 cSt)1 drops/min.
- Pilot Passage into Valve.035 in.
- Pilot Volume Displacement.07 in³
- Valve Hex Size1 1/8 in.
- Valve Installation Torque45 - 50 lbf ft
- Seal kit - Cartridge
- Seal kit - Cartridge
- Seal kit - Cartridge
- Supply Voltage20-30 VDC
- Operating Temperature Range-25 to 80 °C
- Vibration≥ 50g, 0-500 impulses/sec
- Shock>50 g, 1ms
- Reverse Polarity ProtectionYes
- Maximum Output Load≤ 400 mA, Duty Ratio 100%
- Short Circuit ProtectionYes, Load Short Unlimited
- Turn On Time≤ 25 ms
- Hysteresis≤ .002 in.
- Thermal Shift - 0 to 80 °C ≤ ±.004 in.
- EMCDIN EN 61000-6-1/2/3/4
- ConnectorM12 X 1 (4) Pin
- Connector Environment RatingIP65
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- LOFO Pilot-to-close, spring-biased open, unbalanced poppet logic element
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