Specifications - Emerson Fisher 63EG-98HM Instruction Manual

Pilot-operated relief valve or backpressure regulator

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Type 63EG-98HM

Specifications

This section lists the specifications for Type 63EG-98HM relief valves or backpressure regulators. Factory

specifications are stamped on the main valve and pilot nameplates. The main valve nameplate is located on the

main valve body. The pilot relief pressure range appears on the pilot nameplate.

Main Valve Body Sizes and End Connection Styles

See Table 1

Maximum Design Pressure

600 psig / 41.4 bar or body rating limit, whichever

is lower

Maximum Operating Relief (Inlet) Pressure

Including Build-up

(2)(3)

450 psig / 31.0 bar or body rating limit, whichever

is lower

Maximum Outlet Pressure

450 psig / 31.0 bar

Maximum Differential Pressure

400 psig / 27.6 bar

Relief Set Pressure/Backpressure Control Ranges

See Table 3

Port Diameter and Valve Plug Travels

See Table 2

Differential and Build-up Pressure Requirements

See Table 4

1. Other ratings and end connections can usually be supplied; consult the local Sales Office.

2. The pressure/temperature limits in this Instruction Manual and any applicable standard limitation should not be exceeded.

3. Fluorocarbon (FKM) diaphragm is limited to 300 psig / 20.7 bar.

4. Set pressure is defined as the pressure at which the pilot starts-to-discharge.

5. Special low temperature constructions for process temperatures between -76 to 104°F / -60 to 40°C are available by request. The low temperature construction passed Emerson

laboratory testing for lockup and external leakage down to -76°F / -60°C.

Table 1. Body Sizes and End Connection Styles

MAIN VALVE BODY SIZE

NPS

3, 4, 6

80, 100, 150

8 x 6

200 x 150

CONTROL PRESSURE RANGE

psig

bar

15 to 35

1.0 to 2.4

25 to 75

1.7 to 5.2

70 to 140

4.8 to 9.7

130 to 200

9.0 to 13.8

100 to 375

6.9 to 25.9

150 to 375

10.3 to 25.9

(2)

1. All springs may be backed off to 0 psig / 0 bar. However, highest capacities and best performances are obtained by using these springs in their recommended ranges.

2. 150 to 375 psig / 10.3 to 25.9 bar spring range is only for the Type MR98HH pilot construction; consult the local Sales Office for this option..

(2)(3)

(2)

END CONNECTION STYLE

NPT, ASME CL150 RF, CL300 RF,

CL600 RF or PN 16/25/40 flanged

ASME CL150 RF, CL300 RF,

CL600 RF or PN 16/25/40 flanged

ASME CL150 RF, CL300 RF

and CL600 RF flanged

Table 3. Relief Set Pressure or Backpressure Control Ranges

(1)