Product Overview
Cartridge
Description
This valve is a pilot to open check valve. It has a sealed pilot, a steel seat, and is vented. It allows free flow from the valve (port 2) to the load (port 1) and blocks flow in the opposite direction.
Pressure at the pilot (port 3) will open the valve from port 1 to port 2. Pilot pressure needed to open the valve is directly proportional to the load pressure at port 1. The valve is insensitive to pressure at port 2 because the spring chamber is referenced to the vent (port 4).
Pilot pressure as low as 75 psi (5 bar) higher than the pressure at the vent can prevent the valve from closing.
Will accept pressure at port 4 (vent) but can not exceed 5000 psi (350 bar).
Pilot-to-open check cartridges are locking valves, not motion control valves. For motion control applications, use counterbalance valves.
Specifications
Cavity T-22A
Series 2
Capacity 30 gpm
Maximum Operating Pressure 5000 psi
Pilot Ratio 3:1
Maximum Valve Leakage at 110 SUS (24 cSt) 1 drops/min.
Valve Hex Size 1 1/8 in.
Valve Installation Torque 45 - 50 lbf ft
Adjustment Screw Internal Hex Size 1/8 in.
Locknut Hex Size 7/16 in.
Model Weight 0.66 lb.
Seal kit - Cartridge Buna: 990022007
Seal kit - Cartridge Polyurethane: 990022002
Seal kit - Cartridge Viton: 990022006
Features
Approximately 1 drop (0,07 cc) of fluid will pass from the pilot area to the vented spring chamber every 4000 cycles.
For models with manual load release control option, turn load release clockwise to release load.
Provides hose break protection, prevents loads from drifting and positively locks pressurized loads.
Extremely low leakage. The seat and poppet are heat treated for long life. If the load drifts due to the valve, the seat has probably been damaged by contamination and the valve should be replaced.
Sealed pilot for use in circuits where cross port leakage is undesirable.
Port 4 (vent) should never be blocked as seal weepage will eventually cause valve to malfunction.
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.
*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.
