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Installation Guide
English – May 2002
Type 627-109
Introduction
This installation guide provides instructions for installation, startup, and adjustment. For further information refer to:
Type 627-109 Instruction Manual, form 5084,
D100339X012 or www.FISHERregulators.com.
P.E.D. Categories
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.
P R O D U C T S I Z E
D N 2 0 ( 3 / 4 i n c h )
C A T E G O R I E S
S E P
F L U I D T Y P E
1
Specifications
Body Size and End Connection Style
DN 20 (3/4 inch) NPT
Maximum Inlet and Outlet Pressures
(1)
1000 psig
Outlet Pressure Ranges
5 to 20 psig
15 to 40 psig
35 to 80 psig
70 to 150 psig
Maximum Pressure Drop
1000 psig
Proof Test Pressure
All Pressure Retaining Components have been proof tested per Directive 97/23/EC - Annex 1,
Section 7.4
Temperature Capabilities
Nitrile: -40 to 82°C (-40 to 180°F)
Fluoroelastomer: -18 to 149°C (0 to 300°F)
Installation
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.
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.
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.
To avoid such injury or damage, provide pressure-relieving or pressure-limiting devices (as required by the appropriate code, regulation, or standard) to prevent service conditions from exceeding limits.
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.
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.
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.
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.
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 properly adjusted, slowly open the upstream and downstream shutoff valves.
1. The pressure/temperature limits in this installation guide and any applicable standard or code limitation should not be exceeded.
www.FISHERregulators.com
Type 627-109
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)
To avoid personal injury resulting from sudden release of pressure, isolate the regulator from all pressure before attempting disassembly.
Parts List
Key Description
1 Body
2
5
9
Orifice
Lower Casing
Valve Plug Assembly
10 Stem
11 Stem O-Ring
14 Drive Pin
15 Lever
16 Lever Retainer
17 Lever Pin
18 Cap Screw
19 Pusher Post Assembly
23 Diaphragm
24 Diaphragm Head
27 Relief Spring
29 Spring Case
Key Description
30 Vent
31 Lower Spring Seat
32 Spring
33 Upper Spring Seat
34 Locknut
35 Adjusting Screw
36 Adjusting Screw Cap
37 Cap Screw
43 Blocked Throat
44 Blocked Throat O-Ring
45 Throat Backup Ring
46 Cap Screw
62
65 Relief Disk
66 Pin
34B2314
Figure 1. Type 627-109 Assembly
©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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