Emerson Type 627F Pressure Reducing Regulator Installation Guide 627F_IG_pr.p65

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Installation Guide
English – May 2002

Type 627F

Introduction

Installation

This installation guide provides instructions for installation,
startup, and adjustment. To receive a copy of the instruction
manual,
contact
your
local
Fisher
Sales
Office or Sales Representative or view a copy at
www.FISHERregulators.com. For further information refer to:

Only qualified personnel should install or service
a regulator. Regulators should be installed,
operated, and maintained in accordance with
international and applicable codes and
regulations, and Fisher instructions.

Type 627F Instruction Manual, form 5282, D101545X012.

P.E.D. Categories

If the regulator vents fluid or a leak develops in
the system, it indicates that service is required.
Failure to take the regulator out of service
immediately may create a hazardous condition.

This product may be used as a safety accessory with
pressure equipment in the following Pressure Equipment
Directive 97/23/EC categories. It may also be used outside of the Pressure Equipment Directive using sound
engineering practice (SEP) per table below.
PRODUCT SIZE

CATEGORIES

DN 20, 25, (3/4, 1-inch)

SEP

DN 50 (2-inch)

II

Personal injury, equipment damage, or leakage due
to escaping fluid or bursting of pressure-containing
parts may result if this regulator is overpressured
or is installed where service conditions could
exceed the limits given in the Specifications section,
or where conditions exceed any ratings of the
adjacent piping or piping connections.

FLUID TYPE
1

Specifications

To avoid such injury or damage, provide pressurerelieving or pressure-limiting devices (as required
by the appropriate code, regulation, or standard) to
prevent service conditions from exceeding limits.

Body Sizes(1)
DN 20, 25, or 50 (3/4, 1, or 2-inch)
End Connection Styles(1)
DN 20 (3/4-inch): NPT
DN 25 or 50 (1 or 2-inch): NPT; ANSI Class 300RF
or 600RF flanged

Additionally, physical damage to the regulator could
result in personal injury and property damage due
to escaping fluid. To avoid such injury and damage,
install the regulator in a safe location.

Maximum Inlet and Differential Pressures(1)
See table 1

Clean out all pipelines before installation of the regulator
and check to be sure the regulator has not been damaged
or has collected foreign material during shipping. For NPT
bodies, apply pipe compound to the male pipe threads. For
flanged bodies, use suitable line gaskets and approved
piping and bolting practices. Install the regulator in any
position desired, unless otherwise specified, but be sure
flow through the body is in the direction indicated by the
arrow on the body.

Minimum Differential Pressures(1)
Low Differential Actuator Spring
0,34 to 2,4 bar (5 to 35 psig): 0,69 bar (10 psi)
2,4 to 6,9 bar (35 to 100 psig): 1,4 bar (20 psi)
High Differential Actuator Spring
0,34 to 2,4 bar (5 to 35 psig): 1,4 bar (20 psi)
2,4 to 6,9 bar (35 to 100 psig): 1,4 bar (20 psi)
Maximum Emergency Outlet Pressure(1)
17,2 bar (250 psig)
Outlet Pressure Ranges
0,34 to 2,4 bar (5 to 35 psig)
2,4 to 6,9 bar (35 to 100 psig)

Note
It is important that the regulator be installed so that
the vent hole in the spring case is unobstructed at all
times. For outdoor installations, the regulator should
be located away from vehicular traffic and positioned
so that water, ice, and other foreign materials cannot
enter the spring case through the vent. Avoid placing
the regulator beneath eaves or downspouts, and be
sure it is above the probable snow level.

Proof Test Pressure
All Pressure Retaining Components have been
proof tested per Directive 97/23/EC - Annex 1,
Section 7.4
Temperature Capabilities
-29 to 82°C (-20 to 180°F)
1. The pressure/temperature limits in this installation guide and any applicable
standard or code limitation should not be exceeded.

Table 1. Maximum Inlet and Differential Pressures

9,5 x 3,2 (3/8 x 1/8)
9,5 x 6,4 (3/8 x 1/4)
9,5 (3/8)
12,7 (1/2)

LOW DIFFERENTIAL MAIN SPRING (SILVER), bar (PSIG)
Maximum Inlet
6,9
6,9
6,9
4,1

(100)
(100)
(100)
(60)

HIGH DIFFERENTIAL MAIN SPRING (RED), bar (PSIG)

Maximum Differential
6,9
6,9
6,9
4,1

(100)
(100)
(100)
(60)

www.FISHERregulators.com

Maximum Inlet
17,2
17,2
17,2
8,6

(250)
(250)
(250)
(125)

Maximum Differential
17,2
17,2
17,2
8,6

(250)
(250)
(250)
(125)

D101545XENG

ORIFICE SIZE,
mm (INCHES)

Type 627F
Overpressure Protection
The recommended pressure limitations are stamped on
the regulator nameplate. Some type of overpressure
protection is needed if the actual inlet pressure exceeds the
maximum operating outlet pressure rating. Overpressure
protection should also be provided if the regulator inlet
pressure is greater than the safe working pressure of the
downstream equipment.
Regulator operation below the maximum pressure limitations
does not preclude the possibility of damage from external
sources or debris in the line. The regulator should be inspected
for damage after any overpressure condition.

properly adjusted, slowly open the upstream and
downstream shutoff valves.

Adjustment
To change the outlet pressure, remove the closing cap or
loosen the locknut and turn the adjusting screw clockwise
to increase outlet pressure or counterclockwise to decrease
pressure. Monitor the outlet pressure with a test gauge
during the adjustment. Replace the closing cap or tighten
the locknut to maintain the desired setting.

Taking Out of Service (Shutdown)

Startup
The regulator is factory set at approximately the midpoint
of the spring range or the pressure requested, so an initial
adjustment may be required to give the desired results.
With proper installation completed and relief valves

To avoid personal injury resulting from sudden
release of pressure, isolate the regulator from all
pressure before attempting disassembly.

Type 627F Parts List
Key Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
23
24
29
31
32
34
36
37
39
53
54
55
56
58
59
60
61
62
63

Body
Orifice
Cap Screw
Diaphragm Case O-Ring
Diaphragm Case
Boost Body
O-Ring
Stem Guide
Disk Assembly
Stem
Stem O-Ring
Stem Backup Ring
Hair Pin Clip
Drive Pin
Lever
Lever Retainer
Lever Pin
Lever Cap Screw
Pusher Post
Diaphragm
Diaphragm Head
Spring Case
Lower Spring Seat
Tension Spring
Locknut
Closing Cap
Spring Case Cap Screw
Nameplate
Spring Retainer
Diaphragm Connection
Gasket
Reducing Nipple
Pipe Plug
Elbow
Pilot Supply Tubing
Spring Seat Bolt
Washer
Closing Cap Gasket
32B3310-D

Figure 1. Type 627F Assembly

2

Type 627F
Type 6351F Parts List
Key Description
1
2
3
4
6
7
8
9
10
11
22
23
24
28
35
44

Body Assembly
Spring Case
Body Plug
Inner Valve Assembly
Valve Spring
Diaphragm Assembly
Upper Spring Seat
Control Spring
Adjusting Screw
Locknut
Pipe Nipple
Body Plug Gasket
P590 Filter (Optional)
Closing Cap
Vent Assembly
Restriction

32B3797-D

Figure 2. Type 6351F Assembly

P590 Series Parts List
Key

Description

1
2
3
4
5
6
7

Filter Body
Filter Element
Filter Head
Machine Screw
Washer
Spring Washer
Gasket

A7008

Figure 3. Standard P590 Series Filter Assembly

3

Type 627F

©Fisher Controls International, Inc., 2002; All Rights Reserved
Fisher and Fisher Regulators are marks owned by Fisher Controls International, Inc. The Emerson logo is a trade mark and service mark of Emerson Electric Co.
All other marks are the property of their respective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express
or implied, regarding the products or services described herein or their use or applicability. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.

For information, contact Fisher Controls, International:
Within USA (800) 588-5853 – Outside USA (972) 542-0132
Italy – (39) 051-4190-606
Singapore – (65) 770-8320
Mexico – (52) 57-28-0888
Printed in U.S.A.

www.FISHERregulators.com



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