Jordan Valve 657M Series Diaphragm Actuator User Manual

I & m 657m series

nstallatIon

The 657M Diaphragm Actuator is usually delivered

furnished mounted on a Jordan valve body. When

installing the valve body into the pipeline, consult the

instructions for that particular valve body. Should you

have any questions during the installation procedure,

consult your Jordan Valve representative.

The loading pressure is connected to the NPT connec-

tion in the top of the diaphragm case (1/4” for sizes 30

through 60, 1/2” size 70). With larger sizes, it may be

beneficial to reduce the connection down to 1/4”. Pipe

or tubing may be used, and should be run to the out-

put pressure connection on the automatic controller.

Avoid transmission lag in the control signal by keeping

the length of pipe or tubing as short as possible. When

long distances are involved, install a valve positioner

on the actuator. If the valve positioner is provided as

part of the original equipment, the loading pressure

connection will be made at the Jordan Valve manufac-

turing facility.

If the 657M Diaphragm Actuator is shipped alone for

field mounting, it should be mounted onto the valve

body and secured in place with the yoke locknut.

Clamp the actuator stem and valve plug stem together

using the stem connector to provide the proper valve

travel. Refer to the “Assembly Instructions” section of

this manual for complete instructions.

For ease of service, ensure that the control valve is

located for easy access and serviceability with room

above for accessibility. Ensure that sufficient room is

provided below should removal of the actuator and

valve plug be necessary.

peratIon

and

djustment

Refer to the nameplate on the yoke of the actuator

for details on the specific construction and operating

range. The requirements of your specific application

will dictate the spring and diaphragm used in your

657M Actuator. When in service, the actuator will create

full travel of the valve plug when diaphragm pressure is

applied according to the range indicated on the name

plate. Generally, the diaphragm pressure range is 3 to

15 PSI or 6 to 30 PSI, but other ranges may be used.

Pressure within the valve body creates forces on the

valve plug which directly affect the actual operating

diaphragm pressure range. When pressure conditions

in the valve body are different from those indicated in

the factory settings, the valve may not stroke completely

over the indicated range. To achieve correct travel for

the diaphragm pressure range utilized, a simple spring

adjustment is necessary. Note, however, that the actua-

tor spring has a fixed pressure span and that adjust-

ment of the spring compression simply shifts this span

up or down to make the travel of the valve correspond

with the diaphragm pressure range.

ntroductIon

All Jordan Valve equipment, including actuators, are

to be installed and maintained in accordance with

instructions supplied by Jordan Valve. Only qualified

personnel may install and service the actuator, and, if

necessary, contact a gas service person.

Figure 1: Schematic of 657M Actuator

3170 Wasson Road • Cincinnati, OH 45209
Phone 513.533.5600 • Fax 513.871.0105 (f)
[email protected] • www.jordanvalve.com

I & M 657M Series

Installation & Maintenance Instructions for the

657M Series Diaphragm Actuator

657M Direct Acting Diaphragm Actuator

Warning: Jordan Valve Control Valves must only be used, installed and repaired in accordance with these Installa-
tion & Maintenance Instructions. Observe all applicable public and company codes and regulations. In the event
of leakage or other malfunction, call a qualified service person; continued operation may cause system failure or
a general hazard. Before servicing any valve, disconnect, shut off, or bypass all pressurized fluid. Before disassem-
bling a valve, be sure to release all spring tension.

Air Pushes Down

Spring Lifts

Stem moves upward with loss of

operating medium