Clark Reliance Isolation Valves — Bronze & Steel — Northeast Controls Inc.
Northeast Controls Inc.

Clark Reliance — Valves

Bronze & Steel Isolation Valves

5 Bronze Models · 18 Steel Models · Pressures to 3000 PSI

Clark-Reliance Series SG854, SG855, SG860 isolation valves

These Clark Reliance valves are designed and manufactured for demanding applications. Designated as high-grade valves, all models feature valve bodies and packing nuts of ASME Code Bronze. Valve control is speeded by quadruple stem threads that allow full open/closed with only one-quarter turn.

Note: Clark Reliance and Northeast Controls do not recommend tubular glass for use above 250 WSP.

Design Features

→Valve bodies and packing nuts of ASME Code Bronze
→18-position gage lever for precise positioning
→Integral seats for leak-free performance
→Choice of screwed or flanged connections
→Quadruple stem threads — full open/closed with only one-quarter turn
→Chains and handles indicating open/closed positions (ASME Boiler Code compliant)
→Lower valves employ 3/8" pipe tap for blowdown
→Complete valve set includes upper and lower valve, Pyrex tubular glass, guard rods, and two 5-foot chain lengths

450 PSI Rated

Bronze and steel valves for standard boiler gage glass applications. Models 402RS, 403RS, 404RS and flanged variants.

1500 PSI Rated

Steel isolation valves for high-pressure boiler and process applications. Contact us for model selection.

3000 PSI Rated

Heavy-duty steel valves for very high-pressure steam and process applications. Contact us for model selection.

Model Selection Guide — 450 PSI Rated

ModelConnectionMax PressureNet Weight/Set
402RS1/2" NPT250 PSI8 lbs/set
403RS3/4" NPT250 PSI8 lbs/set
404RS3/4" NPT450 PSI8 lbs/set
502RA3/4" 300LB RF FLG250 PSI12 lbs/set
503RA3/4" 300LB RF FLG450 PSI13 lbs/set
TG602RS1/2" MNPT250 PSI13 lbs/set
TG603RS3/4" MNPT250 PSI20 lbs/set
TG604RS3/4" MNPT450 PSI20 lbs/set
TG605RS3/4" 300# RF Flange250 PSI28 lbs/set
TG606RS3/4" 300# RF Flange450 PSI28 lbs/set

For 1500 PSI and 3000 PSI rated models, contact us for the complete model selection guide.

Valve Sales & Technical Support

Contact us for 1500 PSI and 3000 PSI model specifications, pricing, and availability.

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