168 Series
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Within USA (800) 588-5853 – Outside USA (972) 542-0132
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Singapore – (65) 770-8320
Mexico – (52) 57-28-0888
©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.
Printed in U.S.A.
www.FISHERregulators.com
DU8774-D
DU8794
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 adjust-
ment. 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.
Figure 1. 68 Series Switching Valve Body Assemblies
Figure 2. Switching Valve Constructions
Parts List
168 and 168H Series
Key Description
1
Diaphragm Case
2
Spring Case Assembly
2A
Spring Case
2B
Spring Case Bushing
3
Diaphragm Piston
4
Diaphragm
5
Machine Screw
6
Stem
7
Range Adjusting Nut
8
Spring
9
Hex Nut
10
Stem Protector
11
Machine Screw
68 Series
Key Description
1
Body
2
Spring Case Assembly
2A
Spring Case
2B
O-Ring
2C
Trip Lever
2D
Spring
2E
Trip Lever Pin
2F
Spacer
3
Rocker Assembly
4
Seat Ring
5
Roller Assembly
6
O-Ring
7
Rocker Pin
8
Machine Screw
9
Machine Screw
10
Nameplate
Key Description
12
Machine Screw
13
Hex Nut
14
Nameplate
15
Mounting Bracket
16
Cap Screw
17
Vent Screen
18
Body Assembly
19
Spacer
20
Reset Lever
21
Knob
22
Pin
23
Machine Screw
24
Indicator Tag
168 SERIES
168H SERIES
DETAIL OF MANUAL RESET
SWITCH FOR USE WITH
EITHER 168 OR 168H SERIES
