Instruction Manual

ManualsBrandsEmerson ManualsRegulators and Relief ValvesEmerson 66 Series Direct-Operated Regulators and Vacuum Service Equipment

Types 66, 66Z, and 66ZZ

D100247X012

Instruction Manual

Form 1056

November 2008

www.emersonprocess.com/regulators

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.

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

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.

W1935-1

Figure 1. Type 66 Self-Operated Pressure

Reducing Regulator

Summary of content (16 pages)

PAGE 1
Types 66, 66Z, and 66ZZ Instruction Manual Form 1056 November 2008 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 fire 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.
PAGE 2
Types 66, 66Z, and 66ZZ Specifications Body Sizes and End Connection Styles(1) construction Type 66, 66Z, 66ZZ, or 66 vacuum regulators or breakers nominal Body size, inch (DN) END CONNECTION STYLES AND RATINGS(1) Standard Cast Iron Body Optional Steel Body 2 (50) NPT or CL125 FF NPT (all types), CL150 RF (all types), CL150 FF, CL300 RF 3, 4 (80, 100) CL125 FF CL150 RF Maximum Allowable Inlet Pressures(1) Emergency Inlet Pressure: Type 66, 66Z, 66ZZ, or 66 Series Vacuum Breakers: 25 psig (1,72 b
PAGE 3
Types 66, 66Z, and 66ZZ Table 1A. Outlet (Control) Pressure Ranges, 2-inch (DN 50) Body outlet (Control) pressure range construction Type 66 control spring information 2-inch (DN 50) Body Inches w.c. Unless Otherwise Designated mbar 4 to 11(1) 8 to 28(1) Part Number Color Code Free Length, Inches (mm) Wire Diameter, Inches (mm) 10 to 27(1) 20 to 70(1) 0B019727052 1E611427022 Purple None 6.00 (152) 6.00 (152) 0.148 (3,76) 0.
PAGE 4
Types 66, 66Z, and 66ZZ Table 1C. Outlet (Control) Pressure Ranges, 4-inch (DN 100) Body outlet (Control) pressure range construction control spring information 4-inch (DN 100) Body Inches w.c. Unless Otherwise Designated mbar 4 to 11(1) 8 to 28(1) 10 to 27(1) 20 to 70(1) 1D527527022 1D527627032 2 to 5 4 to 8 5 to 12 10 to 20 1D892627022 1D893427022 7 to 12 10 to 17 14 to 28 17 to 30 25 to 42 35 to 70 1D893227032 1D893527032 1D893627032 0.75 to 1.5 psig 1 to 2 psig 1.
PAGE 5
Types 66, 66Z, and 66ZZ air control valve Remote vent bypass line fan furnace optional pressureloading line vent Block valves or plug cocks block valve or plug cock AD6808 A2495-1 block valve block valve 12 diameter of regulator size pipe before swage Swage Nipple Figure 2. Type 66 Regulator in Pressure-Reducing Application gas 15A9913-A A2496-1 Figure 3.
PAGE 6
Types 66, 66Z, and 66ZZ control spring diaphragm valve stem external control line valve skirt SEAT ring A6550 inlet pressure outlet pressure atmospheric pressure Figure 5. Standard Steel Body Operational Schematic Install the Types 66, 66Z, and 66ZZ regulators horizontally with the spring case vertically above the valve body. Other orientations change the regulator set point and controlled pressure range due to the weight of the internal parts.
PAGE 7
Types 66, 66Z, and 66ZZ vented gas can become an explosion, fire, or toxic hazard. Provide piping to remotely vent the gas to a safe area away from buildings, air intakes, or any hazardous location. The line or stack opening must be protected against condensation, freezing, or any clogging substance. If a remote vent is needed, remove the upper diaphragm casing vent and connect 3/4-inch threaded NPT piping to the upper diaphragm casing.
PAGE 8
Types 66, 66Z, and 66ZZ Replacing Plug O-Ring or Metal Seated Valve Plug 1. Remove hex screws (key 20) from the bottom flange (key 7). 2. Remove the bottom flange and bottom flange gasket (key 19). With the Type 66Z regulator, the counter spring (key 38) will fall out when the bottom flange is removed. 3. Remove the pipe plug from the side of the valve body.
PAGE 9
Types 66, 66Z, and 66ZZ instructions. Continue to step 7 if further disassembly is required. 7. Remove the lower diaphragm plate (key 4), the top stem gasket (key 18), the diaphragm spacer (key 16), the middle stem gasket (key 18), and the upper balancing diaphragm plate (key 15). 8. To aid in assembly, record the position of the lower diaphragm casing with respect to the valve body.
PAGE 10
Types 66, 66Z, and 66ZZ 16. For the Types 66 and 66Z regulators, align the upper diaphragm casing (key 2) using the marks made in the Disassembly section step 3. Place the upper diaphragm casing (key 2) on the diaphragm, fasten the cap screws and hex nuts (keys 21 and 22), tightening the cap screws using an even, crisscross pattern and put the spring (key 6) on the spring seat in the spring case.
PAGE 11
Types 66, 66Z, and 66ZZ 69 68 27 13 26 11 30 37 optional metal seat 25 23 33 36 29 17 2 4 28 5 21 32 22 3 APPLY LUB 31 34 16 14 18 35 13 15 9 11 1 10 19 51 7 CJ8392-F CK4805-D A2502-1 NOT SHOWN 8 37 23 20 Figure 6.
PAGE 12
Types 66, 66Z, and 66ZZ 69 68 27 30 2 36 26 18 25 6 17 16 4 29 33 21 32 28 22 10 3 11 35 14 12 15 37 13 9 8 31 NOT SHOWN 23 38 19 APPLY LUB 34 1 7 30A4436-D A2501-1 20 Figure 8. Type 66Z Regulator 69 27 68 57 26 54 25 43 53 6 52 34 33 32 4 18 16 13 5 2 3 15 21 14 22 35 1 12 10 11 37 8 9 23 19 7 20 30A6347-D 12 30 Figure 9.
PAGE 13
Types 66, 66Z, and 66ZZ Key Description Part Number 4 Diaphragm Plate, Plated steel (2 required) 2-inch (DN 50) body 3-inch (DN 80) body 4-inch (DN 100) body 1D255625072 1D477328992 1D477425062 5* Diaphragm Nitrile (NBR)/Nylon (PA) 2-inch (DN 50) body 3-inch (DN 80) body 4-inch (DN 100) body Fluorocarbon (FKM) 2-inch (DN 50) body 3-inch (DN 80) body 4-inch (DN 100) body 6 Spring 7 Bottom Flange, Zinc plated steel Standard 2-inch (DN
PAGE 14
Types 66, 66Z, and 66ZZ Key Description 13 Valve Plug Stem (continued) For Type 66ZZ 2-inch (DN 50) body Brass 3-inch (DN 80) body Brass 4-inch (DN 100) body Brass 14* Balancing Diaphragm Types 66 and 66Z Nitrile (NBR) 2-inch (DN 50) body 3-inch (DN 80) body 4-inch (DN 100) body Fluorocarbon (FKM) 2-inch (DN 50) body 3-inch (DN 80) body 4-inch (DN 100) body Type 66ZZ Nitrile (NBR) 2-inch (DN 50) body 3-
PAGE 15
Types 66, 66Z, and 66ZZ Key Description Part Number Key Description Part Number 35* Gasket, Neoprene (CR) 2-inch (DN 50) body 3-inch (DN 80) body 4-inch (DN 100) body 1D843604082 1D843704082 1D843804082 36 Washer, Types 66 and 66Z only 2 and 3-inch (DN 50 and 80) Zinc-plated steel 50 Lock Washer, for Type 66 with external control line and adjusting travel stops, Steel (2 required) 2-inch (DN 50) body 4-inch (DN 100) body 1A339828992 1A343628992 1H
PAGE 16
Types 66, 66Z, and 66ZZ Industrial Regulators Natural Gas Technologies TESCOM Emerson Process Management Regulator Technologies, Inc. Emerson Process Management Regulator Technologies, Inc. Emerson Process Management Tescom Corporation USA - Headquarters McKinney, Texas 75069-1872 USA Tel: 1-800-558-5853 Outside U.S. 1-972-548-3574 USA - Headquarters McKinney, Texas 75069-1872 USA Tel: 1-800-558-5853 Outside U.S.