Emerson EZH and EZHSO Series Pressure Reducing Regulators Arkusz Danych Pobierz pdf (Strona 3)

Bulletin 71.2:EZH and EZHSO

Available Congurations

Type EZH (Spring-to-Close): Pilot-operated

pressure reducing regulator for low to high

outlet pressure

Type EZHSO (Spring-to-Open): Pilot-operated

pressure reducing regulator for low to high

outlet pressure

Type EZHOSX: Type EZH with a Type OS2 slam-

shut device for overpressure (OPSO) or overpressure

and underpressure (OPSO/UPSO) protection

Type EZHSO-OSX: Type EZHSO with a

Type OS2 slam-shut device for overpressure

(OPSO) or overpressure and underpressure

(OPSO/UPSO) protection

Body Sizes, End Connection Styles and

Pressure Ratings

(1)

See Table 1

Maximum Allowable Pressures

(1)

Inlet Pressure: 1500 psig / 103 bar

Outlet (Casing) Pressure: 1500 psig / 103 bar

Emergency Casing Pressure: 1500 psig / 103 bar

Maximum Operating Differential Pressures

(1)(3)

Main Valve: 1500 psid / 103 bar d

Pilot: Between loading pressure in pilot and

loading sense pressure: 1233 psid / 85.0 bar d

Minimum Differential Pressures

(1)

See Table 3

Outlet Pressure Ranges

See Table 2

Flow and Sizing Coefcients

See Tables 7 through 16

Flow Capacities

See Tables 17 through 20

Pilot and Filter Regulator Flow Coefcients

Type PRX Pilot: C

: 10.5; C

: 0.36; C

: 29

Type SA/2 Filter Regulator: C

: 4.9

Pressure Registration

External

Pilot Connections

1/4 NPT

Temperature Capabilities

(1)

Nitrile (NBR) Version:

-20 to 180ºF / -29 to 82ºC

Fluorocarbon (FKM) Version:

0 to 180ºF / -18 to 82ºC

(2)

Polyurethane (PU) Version:

-22 to 180ºF / -30 to 82ºC

Options

• Pre-piped Pilot Supply

• Travel Indicator

• Whisper Trim™ Cage (NPS 2 to 4 / DN 50 to

100 Sizes Only)

Construction Materials

Main Valve

Main Valve Body:

Types EZH and EZHSO: WCC Steel

Types EZHOSX and EZHSO-OSX: LCC Steel

Intermediate Flange and Actuator Casings:

Steel, ASTM A350 LF2

Diaphragm Plates: Steel, ASTM A105

Diaphragm: Nitrile (NBR) with PVC coating

O-ring: Fluorocarbon (FKM)

Disk: Nitrile (NBR), Fluorocarbon (FKM) or

Polyurethane (PU)

PRX Series Pilots

Body: Steel, ASTM 105

Trim: Stainless steel

Elastomers: Nitrile (NBR) or Fluorocarbon (FKM)

Disk: Polyurethane (PU) or Fluorocarbon (FKM)

Type SA/2 Pilot Supply Filter Regulator

Body: Steel

Diaphragm: Nitrile (NBR) with PVC coating

O-ring/Disk: Nitrile (NBR) or Fluorocarbon (FKM)

Type OS2 Slam-Shut Device

Mechanism Box: Aluminum alloy

First and Second Stage Mechanism: WCC Steel

Diaphragm: Nitrile (NBR)

Bellows: 316 Stainless steel

Approximate Weights

See Table 22

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

2. Types PRX and SA/2 Fluorocarbon (FKM) elastomer is limited to 0°F / -18°C.

3. Maximum Operating Differential Pressure is 1400 psid / 96.5 bar d for NPS 1 / DN 25 Type EZHSO.

Specications

The Specications section lists the specications for the EZH and EZHSO Series pressure reducing regulators.

Factory specication is stamped on the nameplate fastened on the regulator at the factory.

1 2 3 4 5 6 7 8 ... 27 28

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