Proportionally controlled or On/Off The reaction against water hydrostatic force inside the valve, is made by an hydraulic cylinder. It can be controlled by a proportional oil regulation loop, to the effective water pressure inside the valve or simply with a ON/OFF control to the total amount of force needed.
Proportional press block, allows the system to strongly reduce mechanical effort on valve body. Not suggested to test BW ending valves.
No external forces applied on valve body.
The tightness is made by a ORing seal the work on the inner side of valve body. Also called “Bore Plugs” style.
This clamping style allows the valve to expand itself under the pressure test solicitation. It is the test style suggested by all most diffused test standards.
Bore plugs adaptors need a low roughness grade of walls of valve body, allowing O-Ring to make the tightness.
Specially suggested for BW ending valves.
Suitable for all valves termination kind. It is a combination of style “1” and “2”. In one test rig there are both clamping possibilities.
Operator could choose the best one according to the valve kind under test.
Visual leak test.
It has the same block ability of clamping style“3”, plus the claws added to one clamping side.
This allows the user to make a visual check of seat leakage, on a flanged valve not
machined in the bore
Visual leak test.
It has the same block ability of tightness type “4”, without upper side Closing device.
This makes it the most suitable clamping style for 90° angle valves or PSV.
It can be used only for flanged valves.
Both valve sides are clamped with claws clamping style .
It can be used only for flanged valves.
Automatic press clamping.
Useful for flange surface ORing seal, developing an accurate proportional press clamping applied to a clamping style Nr. 2
