Reliance SG600, SG700 and SG800 Series forged steel water gage valves

Reliance steel water gage valves isolate high pressure boiler gage glasses. All models are of outside screw and yoke design, so the stem bushing sits outside the body, away from heat and corrosive fluids.

The lever operated SG800 Series goes to 1500 psi at 600 °F. It has a forged SA-105 body, a 303 stainless stem, a one-piece 420F stainless replaceable seat and a Grafoil packing cartridge held by two-bolt yokes; a quadruple stem thread opens or closes it in a quarter turn. Models differ in vessel and gage connections, ball check position and unions, from the basic SG854 with 3/4 inch male pipe connection to the flanged SG861US with ball checks and unions.

For the highest pressures the SG600 and SG700 Series are operated by chain wheel, with a single-pitch thread, up to 3000 psi at 700 °F. They carry 1/2 inch Class 2500 RTJ gage connections that match flat glass FG2000 and Simpliport P4100 gages.

Selection data we need

Boiler design pressure and temperature, gage glass model and valve centres, vessel and gage connection types, ball check and union requirements, lever or chain wheel operation.