PO Check Valves - Hydraulic Actuators & Controls

PILOT OPERATED CHECK VALVES:

Spool Control Valves inherently leak allowing cylinders to drift. The inclusion of a P O Check Valve in the circuit will positively lock a cylinder in position.

Variations:

Single or Dual Valves. Lock one or both ends of a cylinder respectively.
O Ring on Piston. Isolates the pilot system and reduces losses in low flow systems.
Flat on Piston. Speeds up valve closing on circuits with long hoses.
Ratio. Standard ratio 3:1 – others available on request.
Vented Valves. Prevent chattering or hunting caused by system back pressure. Only available on single versions.
Soft Seats. For leak-tight holding on low volume systems over long periods, e.g. workholding.

Valve Details:

Single Pilot Operated Check Valves		Size (BSP)
V-101	Line Mounted	1"
V-137	Line Mounted	1"
V-201	Line Mounted	1/2",3/4"
V-221	Line Mounted, Vented	3/8",1/2",3/4"
V-336	Line Mounted	1/2",3/4"
V-337	Line Mounted	1/2",3/4"
V-337 Y	Line Mounted	1/2",3/4"
V-411	Line Mounted, Vented	1/4",3/8",1/2"
V-427-B	Line Mounted	3/8"
V-434-A	Manifold Mounted	1/4"
V-434-B	Manifold Mounted	3/8"
V-436	Line Mounted	1/4",3/8",1/2"
V-437	Line Mounted	1/4",3/8",1/2"
V-437 Y	Line Mounted	1/4",3/8",1/2"
V-457-A	Banjo Mounted	1/4"
V-457	Banjo Mounted	3/8",1/2"
V-464-A	Banjo Mounted	1/4"
V-464	Banjo Mounted	3/8",1/2"
V-9510	Weldable, thru' ported	3/8"
V-9610	Line Mounted, High Pressure, 700 bar	3/8"

Dual Pilot Operated Check Valves		Size (BSP)
V-338	Manifold Mounted	1/2",3/4"
V-339	Line Mounted	1/2",3/4"
V-426	Line Mounted	1/4",3/8",1/2"
V-429	Line Mounted	1/4",3/8"
V-438	Manifold Mounted	1/4",3/8",1/2"
V-439	Line Mounted	1/4",3/8",1/2"
V-453-A	Banjo Mounted	1/4"
V-453	Banjo Mounted	3/8",1/2"
V-486	Line Mounted, Ideal for Cylinders	1/4", 3/8", 1/2"
VC-486_75	Weldable 3/4" OD Pipe	3/8"
VC-486 18mm	Weldable 18mm OD Pipe	3/8"
V-738	Manifold Mounted	1/4",3/8"
V-9490	Line Mounted, Twin, Dual PO Check	3/8"