NRS gate valve is developed to be used as the cut off and zone control valves in order to substitute
supervisory switched butterfly valves and OSY rising stem valves in the fire security systems. These valves are usually burried underground to prevent the risk of freeze. Just to make them visible and traceable inside the systems, they are preferred to be used with post indicators instead of wheels. Valves could be commanded to get on/off by using post indicators and the valve positions could and traced.

Disadvantages: Bigger than some valves which is using in fire fighting systems, and non-economic than the others.

Advantages: Smaller than pressure reduce control valves, and easy maintenance.

• Connection: Flanged
• Working Pressure: 200psi ~ 300psi
• Dimensions:2 ½” – 16”
• Max Working Temperature: 0.6®C – 52®C

Material Attributes: 
– Body: ASTM A 536 Sfero Cast Iron
– Lid: ASTM 536 Sfero Cast Iron
– Bolt: ASTM AISI420 Stainless Steel
– Slide: Sfero Cast Iron EPDM coated
– Gasket: EPDM
– O-ring: EPDM

Application Area: 
They are used on fire pipes that are going underground to prevent the line from freezing.

Approvals: 
– UL Listed
– ULc Listed
– FM Approved