Product Overview
Cartridge
Description
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.
Specifications
Cavity T-17A
Series 3
Capacity 100 gpm
Maximum Operating Pressure 5000 psi
Maximum Valve Leakage at 110 SUS (24 cSt) 10 drops/min.
Pilot Volume Displacement .25 in³
Pilot Passage into Valve .06 in.
Area Ratio, A3 to A1 1.8:1
Area Ratio, A3 to A2 2.25:1
Valve Hex Size 1 1/4 in.
Valve Installation Torque 150 - 160 lbf ft
Seal kit - Cartridge Buna: 990017007
Seal kit - Cartridge EPDM: 990017014
Seal kit - Cartridge Polyurethane: 990017002
Seal kit - Cartridge Viton: 990017006
Model Weight 1.11 lb.
Features
These valves have positive seals between port 2 and the pilot area.
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.
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%.
All ports will accept 5000 psi (350 bar).
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.
*Please note that image representation may only represent a product series with particular items. The buyers responsibility is to ensure the product SKU matches their specifications before purchase.
