Emerson 66 Installation Guide

Installation Guide
English – May 2002

Types 66, 66Z, and 66ZZ

Introduction

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:

Type 66, 66Z, and 66ZZ Instruction Manual (form 1056,
D100247X012).

The Type 66 self-operated regulator maintains a reduced
outlet pressure while satisfying the downstream flow
demands. The Type 66Z and 66ZZ self-operated regulators
also control a reduced outlet pressure; however, both have
springs sensitive to negative pressures and can be used
for vacuum regulation.

P.E.D Category

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.

EZISTCUDORPSEIROGETACEPYTDIULF

)hcni-4-2(001-05NDPES1

Specifications

Body Sizes and Styles

See table 1

Maximum Allowable Pressures

(1)

Maximum Safe Inlet Pressure to Avoid Internal Part
Damage

bar (5 psig) for Type 66Z, and 0,14 bar (2 psig) for
Type 66ZZ

Maximum Operating Inlet Pressure
for Good Performance

and 66Z, and 0,14 bar (2 psig) for Type 66ZZ

Emergency Inlet

Emergency Outlet

: 0,69 bar (10 psig) for Type 66, 0,34

(1)

Recommended

: 0,34 bar (5 psig) for Types 66

: 1,7 bar (25 psig)

: 0,6 bar (8 psig)

Proof Test Pressure

All Pressure Retaining Components have been proof
tested per Directive 97/23/EC - Annex 1, Section 7.4

Outlet Pressure Ranges

See table 2

Temperature Capabilities

-29 to 82°C (-20 to 180°F)

(1)

(1)

Installation

Only qualified personnel should install or service
a regulator. Regulators should be installed,

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

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 pressure­relieving 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.

Install Type 66, 66Z, and 66ZZ regulators horizontally with
the spring case vertically above the valve 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.

With steel bodies, an external control line is required.
Connect DN 20 (3/4-inch) NPT control line to the lower
diaphragm casing connection from the point where the
downstream pressure is to be sensed.

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

D100247XENG

www.FISHERregulators.com

Types 66, 66Z, and 66ZZ

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.

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.

Table 1. Body Sizes and End Connection Styles

EZISYDOB

)SEHCNI(ND

)2(05

)4,3(001,08

norItsaCleetS

ecaf-talf,dewercs
degnalf521ssalC

ssalCecaf-talf

degnalf521

Table 2. Outlet Pressure Ranges

SEGNARERUSSERPTELTUO

epyTrabmgisp/.c.wsehcni

rabm72ot01
rabm07ot02

rabm21ot5

rabm02ot01

66

Z66rabm5ot5.2-.c.w.ni-2ot1-

ZZ66rabm6.0ot6.0-.c.w.ni-52.0ot52.0-

muucavseireS66

srekaerbrosrotaluger

rabm03ot71
rabm24ot52
rabm07ot53

rabm301ot25

rabm831ot96

rabm702ot301
rabm543ot702

rabm5-ot0

rabm2-ot7.0-

rabm51-ot5-

rabm7.3ot0

LAIRETAMYDOB

ecaf-desiar,dewercs

051ssalCecaf-talfdna

-desiardna,degnalf
degnalf003ssalCecaf

ssalCecaf-desiar

degnalf051

.c.w.ni-11ot4

.c.wni-82ot8
.c.w.ni-5ot2
.c.w.ni-8ot4

.c.w.ni-21ot7

.c.w.ni-71ot01
.c.w.ni-82ot41

gisp5.1ot57.0

gisp2ot1

gisp3ot5.1

gisp5ot3

.c.wni-2-ot0

.c.w.ni-8.0-ot3.0-

.c.w.ni-6-ot2-

.c.w.ni-5.1ot0

Parts List

Key Description

1 Valve Body
2 Upper Diaphragm Casing
3 Lower Diaphragm Casing
4 Diaphragm Plate
5 Diaphragm
6 Spring
7 Bottom Flange
8 O-ring
9 Disk Retainer
10 Valve Plug Skirt
11 Seat Ring
12 Pitot Tube
13 Valve Plug Stem
14 Balancing Diaphragm
15 Sealing Diaphragm
17 Lower Spring Seat
18 Stem Gasket
19 Bottom Flange Gasket
20 Cap Screw
21 Cap Screw
22 Hex Nut
23 Stop Nut
24 Upper Spring Seat
25 Adjusting Screw
26 Closing Cap Gasket
27 Closing Cap
28 Flapper Valve
29 Snap Ring
30 Y602-10 Vent Assembly
32 Nameplate
33 Nameplate
34 Washer
35 Gasket

Key Description

36 Washer
37 Sealing Washer
38 Counter Spring
43 Spring Retainer
44 Set Screw
45 Hex Nut
46 Adjusting Screw Cap
47 Adjusting Cap Gasket
48 Upper Travel Stop
49 Lower Travel Stop
50 Lock Washer
51 Plug
52 Spring Case Coupling
53 Spring Case Extension
54 Ball
57 Retaining Ring
66 Casing Gasket
68 Flow Arrow
69 Drive Screw

CJ8392-F
CK4805D
A2502-1

Figure 1. Soft-Seated Type 66 Regulator

2