Fisher 64 Operating Manual

Instruction Manual
Form MCK-2133

January 2010

64 and 67C Series Regulators

64 and 67C Series Regulators Instruction Manual

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® equipment must be installed, operated,
and maintained in accordance with federal,
state, and local codes and Emerson Process
Management Regulator Technologies, Inc.
instructions. The installation in most states must
also comply with NFPA No. 54 and 58 standards.

Only personnel trained in the proper procedures,
codes, standards, and regulations of the
LP-Gas industry should install and service
this equipment.

W8810

67C SERIES REGULATORS

THINGS TO TELL THE GAS CUSTOMER:

1. Point out the regulator’s vent to the customer (or vent
assembly or vent tube), and stress that this opening must
remain unobstructed at all times. Tell the customer to be
sure to check the vent opening after a freezing rain, sleet
storm, or snow to make sure ice has not formed in the vent.

2. Show the customer the shutoff valve on the container. The
customer should close this valve immediately if gas is
smelled, appliance pilot lights fail to stay on or appear higher
than usual, or any other abnormal situation occurs.

3. Tell the customer to call your company to service the
regulator if the regulator vents gas or a leak develops in the
system. Only a qualied gas service person should

install or service the regulator.

Introduction

Scope of the Manual

This manual provides instructions and maintenance for the
following high-pressure regulators: Types 64, 64KB, 64SR,
67CW, 67CH, 67CD, and 67CN regulators.

Description

The 64 and 67C Series direct-operated regulators (Figure 1) are
designed for high-pressure (pounds per square inch) service and can
be used on either vapor applications in LP-Gas, Natural Gas, and Air
or liquid LP-Gas applications. Depending upon type, outlet pressure
ranges from 3 to 135 psig (0,21 to 9,3 bar). Type 64SR can be used
as a First Stage LP-Gas regulator–reducing tank pressure to
10 psig (0,69 bar) for a Second Stage regulator. Type 64KB is the
only regulator in this series suitable for anhydrous ammonia (NH3)
service. The regulators are normally painted red.

P1027

64 SERIES REGULATOR

Figure 1. 64 and 67C Series Regulators

CAUTION

Do not use the 67C, 64, or 64SR Series regulators
in anhydrous ammonia (NH3) service. They
contain brass materials that are not compatible
with anhydrous ammonia (NH3).

Table 1. Available Congurations

TYPE DESCRIPTION

Basic regulator with four spring ranges from 3 to 100 psig

64

(0,21 to 6,9 bar).
Internal relief version with three spring ranges from 3 to 35 psig

64SR

(0,21 to 2,4 bar).
For use with anhydrous ammonia (NH3) with handwheel

64KB

adjustment and ve spring ranges from 3 to 100 psig
(0,21 to 6,9 bar). Includes a special diaphragm protector.

Basic regulator with wrench adjustment and four spring ranges

67CW

from 3 to 135 psig (0,21 to 9,3 bar); no relief.

67CH Basic regulator with handwheel adjustment.

67CD Basic regulator with dial cap adjustment.

67CN Basic regulator, factory set with no eld adjustment.

www.sherregulators.com/lp

D450128T012

64 and 67C Series Regulators

Specications

Body Sizes, Inlet and Outlet Connection Style

64 Series: 1/2-inch NPT, inlet and outlet
67C Series: 1/4-inch NPT, inlet and outlet

Side Outlet Connection Style (Plugged)

1/4-inch NPT; pressure gauge can be installed

Maximum Inlet Pressure (Body Rating)

(1)

250 psig (17,2 bar)

Maximum Emergency Outlet Pressure

(1)

64 Series: 220 psig (15,2 bar)
67C Series: 50 psig (3,4 bar) over outlet pressure

Pressure Registration

Internal

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

Wide-Open Flow Coefcients

64 Series: Cg: 35.6; Cv: 0.36; C1: 39.0
67C Series: Cg: 11.7; Cv: 0.36; C1: 32.2

Regulator Temperature Capabilities

64 Series: -20° to 150°F (-29° to 66°C)
67C Series: -20° to 180°F (-29° to 82°C)

Spring Case Vent Location

64 Series: 1/4-inch NPT screened over side outlet tap
67C Series: Aligned with inlet, other positions optional

Approximate Unit Weights

64 Series: 2.25 pounds (1 kg)
67C Series: 1 pound (0,5 kg)

Table 2. Outlet Pressure Ranges

SPRING RANGE,

PSIG (bar)

3 to 15 (0,21 to 1,0) - - - - - - - - 10 (0,69) 10 (0,69)

3 to 20 (0,21 to 1,4) 15 (1,0) - - - - 15 (1,0) 15 (1,0) 64KB only

5 to 35 (0,34 to 2,4) 20 (1,4) 10 (0,69); 15 (1,0); or 20 (1,4) 20 (1,4) 20 (1,4)

20 to 50 (1,4 to 3,4) 40 (2,8) 67CD only - - - - - - - - - - - -

30 to 60 (2,1 to 4,1) 40 (2,8) 67W and 67CH only - - - - - - - - 40 (2,8)

35 to 100 (2,4 to 6,9) 50 (3,4) 67CD only - - - - - - - - 50 (3,4)

35 to 135 (2,4 to 9,3) 50 (3,4) 67W and 67CH only - - - - - - - - - - - -

1. All springs can be backed off to 0 psig (0 bar) except Type 67CN. However, for the highest capacity and most accurate control, use the lowest spring that can be adjusted to the required setpoint.

(1)

67CW, 67CD, and 67CH 67CN 64SR 64 and 64KB

TYPE NUMBER AND FACTORY SETPOINT, PSIG (bar)

Specications

Some general 64 and 67C Series ratings and other specications
are given on Specications section. A spring case label gives the
spring range for the regulator as it comes from the factory.

Installation

WARNING

!

Failure to follow these instructions and warnings
could result in personal injury or property damage.

All vents should be kept open to permit free ow
of air into and out of the regulator.

Protect openings against the entrance of rain,
snow, ice formation, paint, mud, insects, or any
other foreign material that could plug the vent or
vent lines.

LP-Gas may discharge to the atmosphere through
the vent of a Type 64SR. The internal relief valve
of the Type 64SR regulator does not provide
full overpressure protection, but is designed for
minor seat leakage only. An obstructed vent
which limits air or gas ow can cause abnormally
high outlet pressure. A vent line to a remote,
safe location outdoors is required on permanent
indoor installations or on installations where
there can be a hazardous accumulation of gas.

Never use a 64 or 67C Series (pounds to pounds)
regulator on low-pressure (inches of water
column) service.

1. Regulator operation within ratings does not preclude the
possibility of damage from debris in the lines or from external
sources. Regulators should be inspected for damage
periodically and after any overpressure condition.

2. Only personnel qualied through training and experience
should install, operate, and maintain a regulator. Make sure
that there is no damage to or foreign material in the regulator.
Also, ensure that all tubing and piping is free of debris.

3. Install the regulator so that ow is from the IN to the OUT
connection as marked on the regulator body.

4. Protect the regulator from vehicular trafc or damage from
other external sources.

5. Install the regulator high enough above ground level, at least
18-inches (457 mm), so that rain splatter cannot freeze in the
vent. Do not install the regulator in a location where there can
be excessive water accumulation or ice formation, such as
directly beneath a downspout, gutter, or roof line or a building.

6. A regulator installed outdoors without a protective hood must
have its vent pointed vertically down to prevent clogging and
moisture accumulation. A clogged spring case vent hole may
cause the regulator to function improperly. To keep this
vent hole from being plugged (and to keep the spring case

2

64 and 67C Series Regulators

from collecting moisture, corrosive chemicals, or other foreign
material) orient the vent to the lowest possible point on the
spring case or point it vertically down, or install the regulator
under a protective cover so that it is protected from the
elements. Inspect the vent hole regularly to make sure it is not
plugged. Spring case vent hole orientation may be changed
by rotating the spring case with respect to the body. A
1/4-inch threaded NPT spring case vent may be remotely
vented by installing obstruction-free tubing or piping into the
vent. Protect the remote vent by installing a screened vent
cap on the remote end of the vent pipe.

7. For use in regulator shutdown, install upstream block and
vent valves and downstream block and vent valves (if
required), or provide some other suitable means of properly
venting the regulator inlet and outlet pressures. Install a
pressure gauge to monitor instruments on startup.

8. Apply a good grade of pipe compound to the male pipe threads
before making connections, making sure not to get the pipe
compound inside the regulator.

9. Install tubing tting or piping into the NPT inlet and outlet
connections on the body.

10. The second 1/4-inch threaded NPT side outlet can be used
for a gauge or other use. If not used, it must be plugged.

11. On liquid service, it is recommended that shutoff valves
be installed on the inlet side of the regulators. Figure 2
shows a typical installation using the Type 64SR. If other
regulator models are used, an external relief valve is
required downstream of the regulator and before any shutoff
valve. Installations with shutoffs downstream of the regulator
can trap liquid between the regulator and the shutoff. The
trapped liquid can vaporize, opening the internal or external
relief valve. On installations where it is impossible to install
the regulator without using shutoffs between the regulator
and the burner, either install the regulator in a safe location or
run a vent line from the Type 64SR vent or the discharge
point of the relief valve to a safe location so that any
discharge through the relief valve will not create a hazard.

SHUTOFF VALVE,
PLUG COCK, ETC.

ACCEPTABLE WITH VENT LOCATED OR PIPED TO
SAFE LOCATION

RECOMMENDED

Figure 2. Type 64SR on Liquid Service Requires Care with

Downstream Restrictions

Large volumes of gas may discharge through
the Type 64SR regulator vent during internal
relief valve operation, which can result in re or
explosion from accumulated gas.

A relief valve is required downstream of all these regulator
to provide overpressure protection to prevent damage to
downstream equipment and systems or when used in liquid
service. The Type 64SR has an internal relief valve that opens
when downstream pressure reaches approximately 125% to
250% of the setpoint. Gas discharge is through the regulator
vent. The Type 64SR gives overpressure protection against
excessive buildup resulting from seat leakage due to worn parts
or chips of foreign material on the orice. Additional external
relief valves may be required to prevent overpressure damage to
downstream equipment or systems.

Startup and Adjustment

Overpressure Protection

WARNING

!

Personal injury or system damage may result if
these regulators are installed without appropriate
overpressure protection. If maximum inlet
pressure to the 64 and 67C Series exceeds
maximum pressure ratings of the downstream
equipment or exceeds maximum allowable outlet
pressure of the 64 and 67C Series, then additional
overpressure protection is required. Outlet
pressures greater than Maximum Emergency
Outlet Pressure limits may cause damage to
regulator parts, leaks in the regulator, or personal
injury due to bursting of pressure-containing
parts or explosion of accumulated gas.

If these regulators are exposed to an
overpressure condition, they must be inspected
for damage that may have occurred.

1. With proper installation completed and downstream equipment

properly adjusted, slowly open the upstream and downstream
shutoff valve (when used) while using pressure gauges to
monitor pressure.

WARNING

!

To avoid personal injury, property damage,
or equipment damage caused by bursting
of pressure-containing parts or explosion of
accumulated gas, never adjust the control spring
to produce an outlet pressure higher than the
upper limit of the outlet pressure range for that
particular spring. If the desired outlet pressure
is not within the range of the control spring,
install a spring of the proper range according to
the Diaphragm Parts Maintenance procedure.

2. If outlet pressure adjustment is necessary, monitor outlet
pressure with a gauge during the adjustment procedure. The
regulator, except for the Type 67CN which is not eld

3

64 and 67C Series Regulators

adjustable, is adjusted by loosening the locknut, if used, and
turning the adjusting screw or handwheel clockwise to increase
or counterclockwise to decrease the outlet pressure setting.
Re-tighten the locknut to maintain the adjustment position.

Shutdown

First, close the nearest upstream block valve and then close
the nearest downstream block valve (when used). Next, open
the downstream vent valve. Since the regulator remains open
in response to the decreasing downstream pressure, pressure
between the closed block valves will be released through the open
vent valve.

Maintenance

WARNING

!

To avoid personal injury or equipment damage,
do not attempt any maintenance or disassembly
without rst isolating the regulator from system
pressure and relieving all internal pressure.

Regulators that have been disassembled for
repair must be tested for proper operation
before being returned to service. Only parts
manufactured by Emerson Process Management
Regulator Technologies, Inc. should be used for
repairing Fisher® regulators. Relight pilot lights
according to normal startup procedures.

Failure to do the following could result in personal injury or
property damage. Visually inspect the regulator each time a gas

delivery is made for:

1. Improper installation;

2. Plugged or frozen vent;

3. Wrong regulator or no regulator in the system;

4. Internal or external corrosion;

5. Age of the regulator;

6. Any other condition that could cause the uncontrolled
escape of gas.

Make sure the regulator vent, vent assembly, or vent tube does
not become plugged by mud, insects, ice, snow, paint, etc. The
vent screen aids in keeping the vent from becoming plugged,
and the screen should be clean and properly installed.

Replace any regulators that have had water in their spring case
or show evidence of external or internal corrosion. Checking for
internal corrosion may require complete removal of the adjusting
screw and shutdown of the gas system. Closely examine
regulators directly connected to the container valve by means of
a solid POL adaptor (horizontal mounting) for signs of corrosion.
Correct any improper installations.

Older regulators are more likely to catastrophically fail because
of worn or corroded parts. Replace regulators over 15 years
of age; other service or environmental conditions may dictate
replacement of the regulator before it becomes 15 years old,
refer to Fisher Bulletin LP-32.

Due to normal wear or damage that may occur
from external sources, these regulators must
be inspected and maintained periodically. The
frequency of inspection and replacement of
the regulators depends upon the severity of
service conditions or the requirements of local,
state, and federal regulations. Even under ideal
conditions, these regulators should be replaced
after 15 years from date of manufacture or sooner
should inspection reveal the need.

LP-Gas Equipment

Emerson Process Management
Regulator Technologies, Inc.

USA - Headquarters
McKinney, Texas 75069-1872 USA
Telephone: [phone]
Telephone: [phone]

For further information visit www.sherregulators.com/lp

The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their prospective owners. Fisher is a mark owned by Fisher Controls, Inc., a
business of Emerson Process Management.

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 specications of such
products at any time without notice.

Emerson Process Management does not assume responsibility for the selection, use or maintenance of any product. Responsibility for proper selection, use and maintenance of any Emerson
Process Management product remains solely with the purchaser.

Regulator Repair

Regulators that have been disassembled for repair must be
tested for proper operation before being returned to service.
Only parts manufactured by Emerson Process Management
Regulator Technologies, Inc. should be used to repair Fisher
regulators. Be sure to give the complete type number of the
regulator when corresponding with the factory.

©Emerson Process Management Regulator Technologies, Inc,. 2002, 2010; All Rights Reserved