Over Centre Valves - Hydraulic Actuators & Controls

OVER CENTRE VALVES:

Used to lock cylinders positively into position and to prevent load runaway during cylinder or motor movement.

Variations:

Single or Dual Valves. Selection dependant on the geometry of the system.
Ratio. Standard Ratio. 7:1 or 10:1 dependant on valve size. Other ratios available.
Shuttle. Valves are available with a built in shuttle valve to hold a brake off during operation.
Tamperproof caps prevent un authorized adjustment.
Mechanical Override unlocks the valve to allow cylinder movement during power failure.

Valve Details:

Alt Text

Relief Valves Direct Acting		Size (BSP)
Cap Types	Available Cap Types for most Relief Valves
V-241	Line Mounted, Dual Crossline	1/2",3/4"
V-369	Line Mounted, Single,	1/2",3/4"
V-441-A	Line Mounted, Dual Crossline	1/4"
V-441	Line Mounted, Dual Crossline	3/8",1/2"
V-448	Banjo Mounted, Dual Crossline, OMP,OMR	1/2"
V-452	Manifold Mounted, Dual Crossline, OMP,OMR	1/2"
V-467	Line Mounted, Single, Differential Area, Crossline	1/4",3/8",1/2"
V469-C	Line Mounted, Single,	1/4",3/8",1/2"
V-469	Line Mounted, Single, Crossline	1/4",3/8",1/2"
V-618	Manifold Mounted, Dual Crossline, OMP,OMR	1/2"
V-628	Manifold Mounted, Single Crossline, OMP,OMR, with brake shuttle	1/2"
V-665-C	Line Mounted, Manual, High/Low Selector	1/2"
V-9205	Cartridge Pilot Operated Relief	--
V-9575	Cartridge Pilot Operated "Dumping" Relief	--

Dual Overcentre Valves		Size (BSP)
V-256	Line Mounted	1/2", 3/4"
V-258	Fully Manifold Mounted	1/2", 3/4"
V-259	Manifold Mounted	1/2", 3/4"
V-296	Line Mounted with Brake Shuttle	1/2", 3/4"
V-296-S	Line Mounted	1/2", 3/4"
V-456	Line Mounted	1/4",3/8",1/2"
V-459	Line Mounted, Part Manifold Mounted	1/4",3/8",1/2"
V-496	Line Mounted	1/4",3/8",1/2"
V-496-S	Line Mounted with Brake Shuttle	1/4",3/8",1/2"