Emerson 630R Datasheet download pdf (Page 2)

Principle of Operation

Refer to Figure 2. Inlet pressure registers beneath the

diaphragm. As long as the inlet pressure is less than

the set pressure, spring force causes the lever to hold

the valve closed. When the inlet pressure exceeds

the set pressure, the diaphragm moves to compress

the spring and the lever opens the valve allowing

inlet pressure to bleed into the downstream line or to

atmosphere until the inlet pressure returns to

set pressure.

Installation

The Type 630R relief valve may be installed in any

position. However, the outlet connection and vents





• Low-Pressure

• High-Pressure



NPS 1 and 2 / DN 25 and 50



NPT, CL150 RF, CL300 RF, or CL600 RF



(1)

 66 psig / 4.6 bar

 550 psig / 37.9 bar





 25 psig / 1.7 bar

 250 psig / 17.2 bar



(1)

See Table 1



Internal



1/2-inch / 13 mm



 



 216.0



: 8.18



 26.4



 0.50

 0.89

 0.441



(1)

  

-20° to 180°F / -29° to 82°C

 

 

0° to 300°F / -18° to 149°C



 Cast iron or steel

 

Cast iron or steel

 Brass or Stainless steel

 Brass or Stainless steel

 Brass or Stainless steel

 Neoprene (CR) or Fluorocarbon (FKM)

 Zinc-plated steel

 Stainless steel

 Plated steel

 Steel

 Copper with Brass trim or

Stainless steel with Stainless steel trim

 Composition

 Zinc-plated steel

 Aluminum (low-pressure) or

Zinc (high-pressure)



1/4 NPT

Option

• Polytetrafluoroethylene (PTFE)

diaphragm protector

1. The pressure/temperature in this Bulletin and any applicable standard or code limitation should not be exceeded.

must be protected against the entrance of rain, snow,

insects, or any other foreign material that may plug the

outlet or affect the opening and closing of the valve.

If it is necessary to pipe away the outlet, remove the

outlet screen (if one is present).

Flow through the valve must be as indicated by the

ow direction arrow on the body. For dimensional

information see Figure 3.

Fisher

provides an instruction manual with every

valves shipped. Refer to this for complete installation,

operation and maintenance instructions. Included is a

complete listing of individual parts and recommended

spare parts.

Bulletin 71.4:630R

1 2 3 4 5 6 7 8

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Emerson 630R Datasheet Page 2

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