Pressure: class 150-2500
size: nps 1/2"-2"
design construction and specification:
gate valves conform to api 602, bs5352, and asme b 16. 34, Each are tested according to api598, and marking is per mss sp-25.

construction Is as follows:
full port or conventional port
outside screw and yoke (os&y)
two piece self aligning packing gland
bolted bonnet with spiral-wound gasket, threaded and seal welded bonnet or threaded and pressure seal bonnet
integral backseat
socket weld ends to asme b16. 11
screwed Ends (npt) to ansi/asme b1. 20. 1