Emerson 627W, 627WH Instruction Manual

Instruction Manual
Form 5447

March 2009

Types 627W and 627WH

Types 627W and 627WH Direct-Operated
Pressure Reducing Liquid Regulators

WARNING

!

Fisher® regulators must be installed,
operated, and maintained in accordance
with federal, state, and local codes,
rules and regulations, and
manufacturer’s instructions.

Installation, operation, and maintenance

procedures performed by unqualied

personnel may result in improper
adjustment and unsafe operation.
Either condition may result in
equipment damage or personal

injury. Use qualied personnel when

installing, operating, and maintaining
the Types 627W and 627WH regulators.

Introduction

Scope of the Manual

This Instruction Manual provides installation, startup,
adjustment, maintenance, and parts ordering
information for the Types 627W and 627WH pressure
reducing regulators for liquid service. Only personnel

qualied through training or experience should install,

operate, and maintain these regulators. If there are
any questions concerning these instructions, contact

your local Sales Ofce before proceeding.

Description

The Types 627W and 627WH (Figure 1) are direct­operated pressure reducing regulators for liquid
service. On the internal registration version,
downstream pressure is registered internally through

the body to the underside of the diaphragm.

Types 627W and 627WH direct-operated regulators

are also available in a downstream control line version
for external pressure registration. The control line
version has a blocked throat with an O-ring stem

W4793

Figure 1. Types 627W and 627WH

Pressure Reducing Liquid Regulator

seal and a 1/4 NPT control line connection in the

diaphragm case. The stem seal separates the body

outlet pressure from the diaphragm case.

Specications

Refer to Specications lists for Types 627W and 627WH
constructions on page 2. Specications for a given

regulator as it originally comes from the factory are
stamped on the spring case nameplate.

www.emersonprocess.com/regulators

D102504X012

Types 627W and 627WH

Specications

Available Construction

Type 627W: Direct-operated pressure reducing
liquid regulator (Figure 2)

Type 627WH: Type 627W with a diaphragm
limiter to deliver a higher outlet pressure
(Figure 2)

Control Line Option: Type 627W or 627WH

with a stem seal between the body outlet pressure

and diaphragm case. Pressure is measured under
the diaphragm through the 1/4 NPT
downstream control line connection (Figure 2)

Body Sizes and End Connection Styles

NPT: NPS 3/4, 1, or 2
CL150, CL300, CL600 RF Flanged:
NPS 1 or 2 (DN 25 or 50)
PN 16/25/40: NPS 1 or 2 (DN 25 or 50)

Maximum Spring and Diaphragm Casing Pressure

(1)

See Table 1

Body Pressure Shell Rating

(1)

NPT (Steel): 2000 psig (138 bar)

NPT (Ductile Iron): 1000 psig (68,9 bar)
CL600 RF Flanged (Steel): 1500 psig (103 bar)

Orice Sizes

Standard: 1/4 or 1/2-inch (6,4 or 13 mm)
Optional: 3/32,1/8, 3/16, or 3/8-inch
(2,4; 3,2; 4,8; or 9,5 mm)

See Table 8

Temperature Capabilities

See Table 4

Pressure Registration

Standard: Internal
Optional: External through 1/4 NPT control
line connection in the diaphragm case

Spring Case Vent Connection
3/4 NPT with removable screened

vent assembly

Elastomer Temperature Ranges

See Table 4

(1)

Control Line Connection
1/4 NPT downstream control

line connection

Wide-Open Cv and IEC Sizing Coefcients
See Table 5

Maximum Operating Inlet and Outlet
Pressure Ranges

(1)

Approximate Weight
10 pounds (5 kg)

See Table 2 for pressures by orice and spring range

Option

Outlet Pressure Ranges

Type 627W: 10 to 150 psig (0,69 to 10,3 bar)
Type 627WH: 140 to 500 psig (9,7 to 34,5 bar)

See Table 2 for pressures by orice and spring range

Outlet Pressure Gauge (Brass):

0 to 30 psi (0 to 2,1 bar)
0 to 60 psi (0 to 4,1 bar)
0 to 160 psi (0 to 11,0 bar)
0 to 300 psi (0 to 20,7 bar)
0 to 600 psi (0 to 41,4 bar)

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

Table 1. Maximum Spring and Diaphragm Casing Pressure

MAXIMUM PRESSURE DESCRIPTION DIAPHRAGM CASING MATERIAL

Maximum pressure to spring and diaphragm casings to prevent

leak to atmosphere (internal parts damage may occur)

Maximum pressure to spring and diaphragm casings to prevent
burst of casings during abnormal operation (leak to atmosphere

and internal parts damage may occur)

Maximum diaphragm casing overpressure (above setpoint) to

prevent damage to internal parts

1. If the spring case is pressurized, a metal adjusting screw cap is required. Contact your local Sales Ofce for details.

Ductile iron 250 17,2 - - - - - - - -

Steel or Stainless steel 250 17,2 800 55,2

Ductile iron 465 32,1 - - - - - - - -

Steel or Stainless steel 1500 103 1500 103

All materials 60 4,1 120 8,3

(1)

TYPE 627W TYPE 627WH

Psig bar Psig bar

2

SCREENED
VENT
ASSEMBLY

ADJUSTING
SCREW CAP

ADJUSTING
SCREW

SPRING CASE

Types 627W and 627WH

DIAPHRAGM

PUSHER
POST

W6306-1

SCREENED
VENT
ASSEMBLY

CONTROL SPRING

INTERNAL
REGISTRATION

DETAIL OF TYPE 627W WITH INTERNAL

DOWNSTREAM PRESSURE REGISTRATION

ADJUSTING
SCREW CAP

ADJUSTING
SCREW

SPRING CASE

CONTROL SPRING

DISK ASSEMBLY

W6483-2

1/4 NPT
CONTROL LINE CONNECTION

DETAIL OF TYPE 627W WITH EXTERNAL

DOWNSTREAM PRESSURE REGISTRATION

1/4 NPT
CONTROL LINE CONNECTION

DIAPHRAGM
LIMITER
O-RING

DIAPHRAGM
LIMITER

DIAPHRAGM

PUSHER
POST

W6305-1

DIAPHRAGM
HEAD

INTERNAL
REGISTRATION

DISK ASSEMBLY

DETAIL OF TYPE 627WH WITH INTERNAL

DOWNSTREAM PRESSURE REGISTRATION

Figure 2. Types 627W and 627WH Construction Details

W5482-1

DETAIL OF TYPE 627WH WITH EXTERNAL DOWNSTREAM PRESSURE

REGISTRATION AND CONNECTION FOR OUTLET PRESSURE GAUGE

3

M1037

Type 627W

Type 627W

July 2008

Type 627W

INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE

Types 627W and 627WH

INLET PRESSURE
OUTLET PRESSURE
ATMOSPHERIC PRESSURE

M1037

Principle of Operation

The Type 627W or 627WH (refer to Figure 2) is a
direct-operated regulator. On the internal registration
version, downstream pressure is registered internally

through the body to the under side of the diaphragm.
When the downstream pressure is at or above the
set pressure, the disk is held against the seat, and
there is no ow through the regulator. When demand

increases, downstream pressure drops slightly allowing

the spring to extend, moving the stem down and the
disk away from the seat. This allows ow through the
body to the downstream system.

Types 627W and 627WH direct-operated regulators

are also available in a downstream control line version.
This version has a stem seal between the body outlet

pressure and diaphragm case. Pressure is registered
under the diaphragm through the 1/4 NPT downstream
control line connection (Figure 2).

Installation

Personal injury, equipment damage,
or leakage due to escaping liquid
or bursting of pressure-containing
parts may result if this regulator is
overpressured or installed where service

Figure 3. Type 627W Operational Schematic (Also Typical of Type 627WH)

connection could exceed the limits given
in Tables 1, 2, and 4 or where conditions
exceed any ratings of the adjacent piping
or piping connections.

To avoid such injury or damage, provide
pressure-relieving or pressure-limiting
devices to prevent service conditions
from exceeding those limits.

!

WARNING

Additionally, the control line could be
broken off the regulator by physical
damage, causing personal injury and
property damage due to escaping liquid.
To avoid such injury and damage, install
the regulators and control line where
they are protected from physical damage.

Liquid pressure control systems should
be designed using engineering practices
to eliminate quick control starting or

stopping of the ow stream, which can

produce water hammer.

Regulator operation within ratings does not preclude

the possibility of damage from debris in the lines or
from external sources. A regulator should be inspected

for damage periodically and after any overpressure

condition. Key numbers referenced in this section are

CAUTION

4