Proportionally controlled or On/Off switch.
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 strength needed.
Proportional press block allows the system to strongly reduce mechanical effort on valve body.
Limit of 10% minimum pressing power.
No external forces applied on valve body.
The tightness is made by a O-Ring seal that works 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. This test style suggested by all widespread test standards.
Bore plugs adaptors need a low roughness grade on valve bore, allowing O-Rings to make the tightness.
Suitable for all valve termination kinds.
It is a combination of style “1% and “2”.
In one test rig there are both clamping possibilities.
Operators can select the best one according to the kind of valve under test.
Limit of 10% minimum pressing clamp.
Visual leak test.
It has the same blocking ability of clamping style”3”, plus 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 an 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 proportional press clamping.
Useful for flange surface with O-Ring seal, developing a natural accurate proportional press clamping applied to a clamping style Nr. 2 test benches or bolts clamping table.
Special automatic overpressure adaptive seals able to peform perfect thighness on pipes/pubs not perfectly round, with elliptical deformation up to 2% of nominal diameter. Especially suggested for pipes testing rigs.
