Type 630R Relief Valve Figure 1. Type 630R Relief Valve Introduction The Type 630R is a general relief valve that is available in NPS 1 and 2 / DN 25 and 50 body sizes. It is frequently used at compressor stations, refineries and similar plants requiring a backpressure gas regulator for relief pressure settings up to 250 psig / 17.2 bar. Features   • Tight Shutoff—Provided by an O-ring seat.   • Easy Maintenance—The inlet adaptor acts as a union nut enabling speedy inspection of trim parts.   • Ease of Use—The Type 630R is available in both high-pressure and low pressure constructions; the low pressure units have larger diaphragm area to provide more accurate control of low pressure settings while the high-pressure units can withstand inlet pressure up to 550 psig / 37.9 bar and can control pressures up to 250 psig / 17.2 bar.  • Interchangeability—The Type 630R relief valve can be easily converted in the field to a Type 630 regulator by reversing the actuator and using a new valve carrier, disk, and orifice.   • Sour Gas Service Capability—Optional materials are available for applications handling sour gases. These constructions comply with the recommendations of NACE International S

Type 630R Specifications This section lists the specifications for the Type 630R relief valve. Factory specifications are stamped on the nameplate fastened on the relief valve at the factory. Regulator Construction Low-Pressure High-Pressure Body Sizes NPS 1 and 2 / DN 25 and 50 End Connection Style NPT, CL150 RF, CL300 RF, or CL600 RF Maximum Inlet Pressure(1) Low-Pressure Construction: 66 psig / 4.6 bar High-Pressure Construction: 550 psig / 37.9 bar Maximum Inlet Pressure Build-up above Setpoint (Internal Damage) Low-Pressure Construction: 25 psig / 1.7 bar High-Pressure Construction: 250...

SPRING CASE DIAPHRAGM BODY ORIFICE DIAPHRAGM CONNECTOR O-RING HOLDER VALVE CARRIER DIAPHRAGM ADAPTOR INLET PRESSURE OUTLET (EXHAUST) PRESSURE ATMOSPHERIC PRESSURE Figure 2. Type 630R Relief Valve Operational Schematic Table 1. Relief Set Pressure Ranges REGULAR CONSTRUCTION RELIEF SET PRESSURE RANGE SPRING PART NUMBER SPRING COLOR CODE SPRING WIRE DIAMETER Olive Drab Green Stripe Blue Stripe Olive Drab Green Stripe Blue Stripe SPRING FREE LENGTH

Type 630R Universal NACE Compliance Optional materials are available for applications handling sour gases. These constructions comply with the recommendations of NACE International sour service standards. The manufacturing processes and materials used by Emerson Process Management Regulator Technologies, Inc. assure that all products specified for sour gas service comply with the chemical, physical, and metallurgical requirements of NACE MR0175 and/ or NACE MR0103. Customers have the responsibility to specify correct materials. Environmental limitations may apply and shall be determined by the...

TYPE 630R WITH NPT BODY Table 3. NPT Dimensions NPT DIMENSIONS, INCHES / mm BODY SIZE, NPS

TYPE 630R WITH FLANGED BODY Figure 4.  Flange Dimensions Table 4.  Flange Dimensions FLANGED DIMENSIONS, IN./ mm Low-Pressure Assembly High-Pressure Assembly

Type 630R Ordering Information When ordering, specify the following information:   1. Complete Type number   2. Body Size   3. Relief Setting   4. Body Material   5. Trim Ordering Guide Regulator Construction (Select One)    Low-Pressure    High-Pressure Trim Material (Select One)    Brass***     Stainless steel** Valve Carrier and Holder (Select One)    Brass***     Stainless steel** Orifice (Select One)    Brass***     Stainless steel** Relief Set Pressure Range (Select One) Body Size (Select One)     NPS 1 / DN 25**     NPS 2 / DN 50**   Low-Pressure       3 to 8 psig / 0.21 to 0.55 bar***...

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