Different valve size and rating , I need to order Gear Box for I have experienced alot that Gear Box get damage .

A domestic equivalent to the Larox rubber pinch valve? Larox's core business is filter presses.

While the hydrostatic proof test of control valves is well defined (e.g. ANSI/ISA-75.19) I have not been able to find a corresponding standard for burst testing.

My general belief is to try and use something other than a knife gate. These valves were originally designed for the Pulp&Paper Industry and would leak both through the seat and the bonnet.

Our High Pressure Separator Level Control Valve is LCV 25, dump valve is LCV 26, pressure control valve is PCV 85. Are these industry standards or site specific.

Which valve should be operated more frequently, a gate valve or a butterfly valve.

A water booster pump circuit which has suction, discharge and bypass valves (all 24"). The water is mixed upstream of this pump with caustic due to process requirement

Flexible wedge gate valves can be converted to solid wedge merely by filling the voids with weld and machine the wedge again.