g-lok needle valves. g-lok range of needle valves is designed for leak free closure, regulations & management of fluids in process systems. features :- 1) available in stainless steel 304 & 316. 2) compact design specially for instrumentation. 3) variety of end connections includes male female npt, bspt & bsp. 4) every valve is factory tested. 5) pressure rating from 3000 psi to 10000 psi.