Emerson 66 Instruction Manual

Instruction Manual
Form 1056

November 2008

Types 66, 66Z, and 66ZZ

Types 66, 66Z, and 66ZZ Pressure
Reducing Regulators

WARNING

!

Failure to follow these instructions or
to properly install and maintain this
equipment could result in an explosion

and/or re causing property damage and

personal injury or death.

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

If the regulator vents gas or a leak
develops in the system, service to
the unit may be required. Failure
to correct trouble could result in a
hazardous condition.

W1935-1

Figure 1. Type 66 Self-Operated Pressure

Reducing Regulator

Call a gas service person to service

the unit. Only a qualied person must

install or service the regulator.

Introduction

Scope of the Manual

This instruction manual provides instructions for
the installation, adjustment, and maintenance
of the Types 66, 66Z, and 66ZZ pressure
reducing regulators. Parts ordering information
is also provided. Other 66 Series regulators and
accessories are covered in other manuals.

Description

The Type 66 self-operated regulator (Figure 1)
maintains a reduced outlet pressure while satisfying

the downstream ow demands. The Types 66Z and

66ZZ self-operated regulators (Figures 8 and 9) also
control a reduced outlet pressure; however, both have
springs sensitive to negative pressures and can be
used for vacuum regulation. Each regulator type has
a balancing diaphragm which increases accurate and

sensitive response to pressure changes by reducing
the unbalanced forces acting on the valve plug. This
regulator and its installation should be checked for
compliance with all applicable codes.

Specications

The Specications table lists the specications for

the Types 66, 66Z, and 66ZZ self-operated pressure

reducing regulators. Some of the specications for a

given regulator as it comes from the factory appear on
the regulator nameplate.

Principle of Operation

The cast iron Type 66 regulator uses a pitot tube to
sense outlet pressure while the steel Type 66 regulator
uses an external control line to sense outlet pressure
as shown in Figure 6. Both pressure-sensing methods
register the outlet pressure under the main diaphragm.
When increased downstream demand lowers the outlet
pressure, the lower pressure under the main diaphragm
causes the regulator main spring and valve plug and
stem assembly to open the regulator seat ring and to
supply more gas to the downstream system.

www.emersonprocess.com/regulators

D100247X012

Types 66, 66Z, and 66ZZ

Specications

Body Sizes and End Connection Styles

END CONNECTION STYLES

AND RATINGS

Standard Cast

Iron Body

CONSTRUCTION

Type 66, 66Z,

66ZZ, or 66

vacuum

regulators

or breakers

NOMINAL

BODY SIZE,

INCH (DN)

2 (50) NPT or CL125 FF

3, 4 (80, 100) CL125 FF CL150 RF

Maximum Allowable Inlet Pressures

(1)

(1)

Optional Steel

Body

NPT (all types),

CL150 RF (all

types), CL150 FF,

CL300 RF

(1)

Emergency Inlet Pressure:

Type 66, 66Z, 66ZZ, or 66 Series Vacuum
Breakers: 25 psig (1,72 bar) positive pressure
66 Series Vacuum Regulators: 8 psig or

16.3-inches of mercury (0,55 bar
differential) vacuum

Maximum Safe Pressure to Avoid Internal
Parts Damage:

Type 66: 10 psig (0,69 bar)
Type 66Z: 5 psig (0,34 bar)
Type 66ZZ: 2 psig (0,14 bar)
66 Series Vacuum Regulators or Breakers:

No more than 1 psig (0,07 bar differential) change
from spring setting

Maximum Operating Inlet Pressure
Recommended for Good Performance:
Type 66, 66Z, or 66 Series Vacuum Breakers:

5 psig (0,34 bar) positive pressure

Type 66ZZ: 2 psig (0,14 bar)
66 Series Vacuum Regulator: 6-inches w.c. or

0.4-inch of mercury (15 mbar differential) vacuum

Maximum Allowable Outlet Pressures

(1)

Emergency Outlet (Casing) Pressure:
Type 66, 66Z, or 66ZZ: 8 psig (0,55 bar)

positive pressure
66 Series Vacuum Regulator: 14.7 psi or

29.9-inches of mercury (1,01 bar
differential) vacuum
66 Series Vacuum Breakers: 8 psi or 16.3-inches
of mercury (0,55 bar differential) vacuum

Maximum Safe Pressure to Avoid Internal
Parts Damage:
Type 66, 66Z, or 66ZZ: 1 psig (0,07 bar

differential) above outlet pressure setting
66 Series Vacuum Regulator: No more
than 1 psig (0,07 bar differential) change from
spring setting

Maximum Operating Pressure Recommended
for Good Performance (66 Series Vacuum
Regulators or Breakers Only):
Vacuum Regulators: 10 psig or 20.4-inches of
mercury (0,69 bar differential) vacuum
Vacuum Breakers: 6-inches w.c. or 0.4-inch of

mercury (15 mbar differential) vacuum

Elastomer Temperature Capabilities
Nitrile (NBR) Standard Elastomers:

-40°to 180°F (-40°to 82°C)
Fluorocarbon (FKM) Elastomers:
0°to 350°F (-18°to 177°C)
Ethylenepropylene (EPDM) Elastomers:

-40°to 275°F (-40° to 135°C)

Pressure Registration

Type 66, 66Z, or 66ZZ

Cast Iron Body: Internal (standard) or external
Steel Body: External (standard) or internal

66 Series Vacuum Regulators or
Breakers: External
Control Line when Used: 3/4-inch NPT standard
Bottom Flange Line when Used: 1/4-inch NPT

standard with removable plug
Spring Case Vent: 3/4-inch NPT standard with
removable Type Y602-10 vent assembly

Outlet (Control) Pressure Ranges

See Tables 1A through 1C

Control Line Connection

3/4-inch NPT

Flow and Sizing Coefcients

See Tables 2 and 3

Approximate Weights

2-inch (DN 50) Body

NPT: 50 pounds (22,7 kg)
Flanged: 55 pounds (25,0 kg)

3-Inch (DN 80) Flanged Body:

100 pounds (45,4 kg)

4-Inch (DN 100) Flanged Body:

155 pounds (70,3 kg)

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

2

Table 1A. Outlet (Control) Pressure Ranges, 2-inch (DN 50) Body

Types 66, 66Z, and 66ZZ

CONSTRUCTION

Type 66

OUTLET (CONTROL)

PRESSURE RANGE

Inches w.c. Unless

Otherwise

Designated

(1)

4 to 11

(1)

8 to 28

2 to 5
4 to 8

7 to 12
10 to 17
14 to 28

0.75 to 1.5 psig
1 to 2 psig

1.5 to 3 psig
3 to 5 psig

mbar

(1)

10 to 27

(1)

20 to 70

5 to 12

10 to 20

17 to 30
25 to 42
35 to 70

0,05 to 0,10 bar
0,07 to 0,14 bar
0,10 to 0,21 bar
0,21 to 0,34 bar

Part Number Color Code

0B019727052
1E611427022

1D892527022
1D892627022

1D892727012
1D892827032
1D892927032

1D765727032
1D765827032
1D962627032
1N506427142

(2)

(2)

(2)

(3)

CONTROL SPRING INFORMATION

2-inch (DN 50) Body

Free Length,
Inches (mm)

Purple

None

Brown

Red

Black

Orange stripe

Unpainted

6.00 (152)

6.00 (152)

6.12 (155)

7.53 (191)

7.88 (200)

7.75 (197)

7.53 (191)

6.09 (155)

Unpainted

6.00 (152)

6.25 (159)

6.31 (160)

Type 66Z -1 to 2 -2 to 5 1D892527022 Brown 6.12 (155) 0.109 (2,77)

Type 66ZZ -0.25 to 0.25 -0,62 to 0,62 1E991427012

66 Series

vacuum regulators

or breakers

1. 1 psig (0,07 bar) minimum differential pressure required with this range.

2. Heavy head construction required.

3. Extra heavy head construction required.

0 to -2

-0.2 to -0.8

-2 to -6

0 to -5

-0,74 to -2

-5 to -15

1J196527012
1H387327012
1N152427012

Unpainted

5.62 (143) 0.085 (2,16)

5.62 (143)

5.62 (143)

5.62 (143)

Table 1B. Outlet (Control) Pressure Ranges, 3-inch (DN 80) Body

Wire Diameter,

Inches (mm)

0.148 (3,76)

0.200 (5,08)

0.109 (2,77)

0.112 (2,85)

0.130 (3,30)

0.148 (3,76)

0.162 (4,12)

0.207 (5,26)

0.225 (5,72)

0.262 (6,66)

0.283 (7,19)

0.102 (2,59)

0.095 (2,41)

0.112 (2,85)

OUTLET (CONTROL)

PRESSURE RANGE

CONSTRUCTION

Type 66

Inches w.c. Unless

Otherwise

Designated

(1)

4 to 11

(1)

8 to 28

2 to 5
4 to 8

7 to 12
10 to 17
14 to 28

0.75 to 1.5 psig
1 to 2 psig

1.5 to 3 psig
3 to 5 psig

mbar

(1)

10 to 27

(1)

20 to 70

5 to 12

10 to 20

17 to 30
25 to 42
35 to 70

0,05 to 0,10 bar
0,07 to 0,14 bar
0,10 to 0,21 bar
0,21 to 0,34 bar

Part Number Color Code

1D479927032
1D527327022

1D893027022
1D893127012

1D892827032
1D893227032
1D893327032

1D765827032
1D962627032
1E204427032
1N506527142

(2)

(2)

(2)

(3)

Type 66Z -1 to 2 -2 to 5 1D893027022 6.12 (155) 0.112 (2,85)

CONTROL SPRING INFORMATION

3-inch (DN 80) Body

Free Length,
Inches (mm)

6.00 (152)

Unpainted

6.00 (152)

6.12 (155)

7.12 (181)

Orange Stripes

Gray with White Stripe

Green

7.75 (197)

7.50 (191)

7.25 (184)

6.00 (152)

6.25 (159)

6.38 (162)

6.38 (162)

Unpainted

Wire Diameter,

Inches (mm)

Type 66ZZ -0.25 to 0.25 -0,62 to 0,62 1E991527012 8.62 (219) 0.100 (2,54)

66 Series

vacuum regulators

or breakers

1. 1 psig (0,07 bar) minimum differential pressure required with this range.

2. Heavy head construction required.

3. Extra heavy head construction required.

0 to -2

-2 to -6

0 to -5

-5 to -15

1J196627012
1K384427012

5.62 (143)

5.62 (143)

0.162 (4,12)

0.207 (5,26)

0.112 (2,85)

0.125 (3,18)

0.148 (3,76)

0.156 (3,96)

0.182 (4,62)

0.225 (5,72)

0.262 (6,66)

0.306 (7,77)

0.362 (9,20)

0.114 (2,90)

0.120 (3,05)

3

Types 66, 66Z, and 66ZZ

Table 1C. Outlet (Control) Pressure Ranges, 4-inch (DN 100) Body

CONSTRUCTION

Type 66

OUTLET (CONTROL)

PRESSURE RANGE

Inches w.c. Unless

Otherwise

Designated

(1)

4 to 11

(1)

8 to 28

2 to 5
4 to 8

7 to 12
10 to 17
14 to 28

0.75 to 1.5 psig
1 to 2 psig

1.5 to 3 psig
3 to 5 psig

mbar

(1)

10 to 27

(1)

20 to 70

5 to 12

10 to 20

17 to 30
25 to 42
35 to 70

0,05 to 0,10 bar
0,07 to 0,14 bar
0,10 to 0,21 bar
0,21 to 0,34 bar

Part Number Color Code

1D527527022
1D527627032

1D892627022
1D893427022

1D893227032
1D893527032
1D893627032

1D771227032
1D771327032
1E204527032

(2)

(2)

(3)

- - - -

CONTROL SPRING INFORMATION

4-inch (DN 100) Body

Free Length,
Inches (mm)

7.75 (197)

Unpainted

7.75 (197)

7.53 (191)

7.75 (197)

Gray
Unpainted
Unpainted

Unpainted
Unpainted
Unpainted

- - - -

7.50 (191)

7.75 (197)

7.81 (198)

7.75 (197)

7.75 (197)

7.53 (191)

- - - -

Type 66Z -1 to 2 -2 to 5 1D892627022 Red 7.53 (191) 0.112 (2,85)

Type 66ZZ -0.25 to 0.25 -0,62 to 0,62 1E937227012

66 Series

vacuum

regulators

or breakers

1. 1 psig (0,07 bar) minimum differential pressure required with this range.

2. Heavy head construction required.

3. Extra heavy head construction required.

0 to -2

-0.2 to -0.8

-2 to -6

0 to 1.5

0 to -5

-0,74 to -2

-5 to -15
0 to 4

1J196727012
1E937227012
1K418127012
1J823827012

Unpainted

11.06 (281) 0.112 (2,85)

11.06 (281)

11.06 (281)

11.50 (292)

11.56 (294)

Table 2. Flow Coefcients

Wire Diameter,

Inches (mm)

0.170 (4,32)

0.225 (5,72)

0.112 (2,85)

0.135 (3,43)

0.156 (3,96)

0.170 (4,32)

0.207 (5,26)

0.262 (6,66)

0.283 (7,19)

0.331 (8,41)

- - - -

0.154 (3,91)

0.112 (2,85)

0.162 (4,12)

0.135 (3,43)

OUTLET

PRESSURE

RANGE,

PSIG (bar)

0.75 to 1.5

(0,05 to 0,10)

1 to 2

(0,07 to 0,14)

1.5 to 3

(0,10 to 0,21)

3 to 5

(0,21 to 0,34)

DROOP,

PSIG (bar)

0.2 (0,01)

0.3 (0,02)

0.3 (0,02)

0.4 (0,03)

0.4 (0,03)

0.6 (0,04)

0.6 (0,04)

0.8 (0,06)

1.0 (0,07)

REGULATING C

2-inch

(DN 50)

765

1150

825

1100

665

1000

540
720
900

3-inch

(DN 80)

Table 3. IEC Sizing Coefcients

BODY SIZE, INCH (DN) X

2 (50)

4 (100) 0.30

1865
2800

1650
2200

1165
1750

725
970

1210

g

4-inch

(DN 100)

2-inch

(DN 50)

3330
5000

3150
4200

2500

37501928.6

- - - -

T

0.775

REGULATING C

3-inch

(DN 80)

21.9

53.38095.1

32.9

23.6

31.4

47.1

62.990120

33.35071.4

15.4

20.6

25.7

20.7

27.7

34.6

v

4-inch

(DN 100)

143

107

- - - -

WIDE-OPEN C

2-inch

(DN 50)

3-inch

(DN 80)

g

4-inch

(DN 100)

WIDE-OPEN C

2-inch

(DN 50)

3-inch

(DN 80)

v

4-inch

(DN 100)

1260 3400 5250 36 97.1 150 35

F

D

F

L

0.35

0.893 (80) 0.34

C

1

4

Types 66, 66Z, and 66ZZ

REMOTE VENT

SWAGE NIPPLE

AD6808
A2495-1

BYPASS
LINE

VENT

BLOCK
VALVE OR
PLUG COCK

12 DIAMETER OF REGULATOR
SIZE PIPE BEFORE SWAGE

BLOCK VALVES OR
PLUG COCKS

Figure 2. Type 66 Regulator in Pressure-Reducing Application

When decreased downstream demand raises the
outlet pressure, the higher pressure under the
main diaphragm opposes the regulator main spring
causing the valve plug and stem assembly to close
the regulator seat ring and to supply less gas to the
downstream system.

The Types 66Z and 66ZZ regulators are identical
to the Type 66 regulator in operation but different
in construction. The Type 66Z regulator (Figure 8)
has a counter spring under the valve plug and disk
assembly which counters the main spring force to
allow settings below atmospheric pressures. The
Type 66ZZ regulator (Figure 9) has a longer spring
case where the main spring, a low rate tension spring,
is stretched between the adjusting screw and the
valve plug stem, also providing below atmospheric
settings and more sensitive pressure regulation than
the Types 66 and 66Z regulators.

Installation

WARNING

!

Exposure of the regulator to physical
damage and to corrosive material can
cause improper operation or release of
pressure. Either condition may result
in equipment damage or personal
injury. Properly install the regulator in
a safe location.

CAUTION

AIR CONTROL VALVE

FAN

OPTIONAL PRESSURE­LOADING LINE

BLOCK
VALVE

MIXER

GAS

15A9913-A
A2496-1

BLOCK
VALVE

Figure 3. Type 66Z Regulator in Gas-Mixing Application

VACUUM REGULATOR SET TO OPEN
AT 1.0-INCH W.C. (2,50 mbar) VACUUM

TYPE 66ZZ REGULATOR SET TO OPEN
AT 0.25-INCH W.C. (0,62 mbar) VACUUM

CONTROL LINES

FILTERS

0 TO 5 PSIG
(0 to 0,34 bar)
AIR OR INERT
GAS SUPPLY
PRESSURE

BJ9005-B
A2494-2

GLOVE

PORT

HOOD PRESSURE TO BE KEPT AT

0.23-INCH W.C. (0,57 mbar) VACUUM

GLOVE

PORT

Figure 4. Type 66ZZ Regulator Installation in Hood

Control System

Regulator operation within Specications

limits and applicable codes does not
eliminate the possibility of damage from
external sources or from debris in the line.
The regulator should be inspected for
damage regularly and after any condition

exceeding Specications limits.

Complete downstream protection is
needed with a Type 66, 66Z, or 66ZZ
regulator if the actual inlet pressure can
exceed the regulator outlet pressure rating
or the pressure ratings of any downstream
equipment. Provide adequate
overpressure protection for the regulator
and any downstream equipment.

FURNACE

TO EXHAUST
HEADER AT
9-INCHES W.C.
(22 mbar)
VACUUM

Use of this regulator where service

conditions can exceed Specications

limits may cause equipment damage
or injury to personnel. Be sure the
regulator service conditions do not

exceed Specications limits.

Make sure that there is no damage to or foreign
material in the regulator and that all tubing and piping
is clean and unobstructed. Install the regulator so

that ow through it matches the arrow marked on

the regulator body. Some typical 66 Series regulator
installations are shown in Figures 2, 3, and 4.

5