Jordan Valve Mark 53 User Manual

I & M Mark 53/54

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone [phone] • Fax [phone]

[e-mail] • www.jordanvalve.com

Warning: Jordan Valve pressure regulators must only be used, installed and repaired in accordance with these
Installation & 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
disassembling a valve, be sure to release all spring tension.

Note: The Mark 53 and Mark 54 Differential Regulators have the same valve body and seating construction as the
Mark 50 and Mark 60 respectively. This supplemental presents only those instructions necessary to maintain the
topworks, and is to be used in conjunction with the Installation and Maintenance Instructions for the Mark 50 and
Mark 60 for other maintenance procedures.

Seal Nut Type

Adjusting Screw

Seal Nut

Spring
Housing

Installation & Maintenance Instructions

Supplement for Mark 53 and Mark 54

Installation

The installation instructions for the Differential Regulator
are identical to the instructions for the Mark 50 and Mark
60 with the following additions:

 Connect the reference pressure feedback line

to the threaded port in the spring housing. The
Flow-Thru Spring Housing has full size threaded
connections so that the reference fluid can be
piped directly through the Spring Housing.

 Trapped air in the upper section of the Spring

Housing can be bled off by opening the Bleed Port
or Bleed Valve (if supplied) or by loosening the Seat
Nut on the Mark 53 and 53C or by loosening the

Handwheel

Adjusting Screw

Packing Nut

Packing Box

1.

Handwheel

Type

Packing Gland
Packing

Gasket

Packing Nut on the Mark 53H.

Seat Nut Type (Standard)

The seal Nut Type Differential Regulators are identical
in all respects to the Mark 50 or the Mark 60 with one
exception. The Seal Nut replaces the Lock Nut. Follow
the instructions in the Mark 50 or 60 I & M.

Handwheel Type

Closing Cap

Adjusting Screw

Lock Nut

Closing Cap
Bushing

Spring Housing

Closing Cap

Type

Gasket (Upper)

Gasket (Lower)

Spring
Housing

1. To remove the packing, remove the Handwheel
Screw and Washer from the Adjusting Screw.

2. Remove the Handwheel and then remove the
Packing Nut.

3. The Packing Gland and the Packing can now be
removed from the cavity of the Packing Box.

4. Teflon-impregnated, square-braided packing is
recommended, but other types may be used
depending upon your requirements.

5. Reassemble in reverse order.

Closing Cap Type

1. If your Differential Regulator is equipped with a
Closing Cap, the only maintenance that will likely
ever be required is the replacement of the gaskets.

2. To replace the gaskets, remove the Closing Cap.
Then remove the Adjusting Screw and Lock Nut.
The Closing Cap Bushing can then be removed.
Replace the gaskets as you reassemble the valve in
the reverse order.

Upper
Diaphragm
Plate

Vent Port

Lower
Diaphragm
Plate

Spacer Plate

Spacer Ring

Spring
Housing

Flow-Thru
Connection
(both sides)

Separated Double Diaphragm

Diaphragm Replacement

1. REMOVE THE REGULATOR FROM THE LINE.

2. Release the compression of the spring by turning
the adjusting screw counter-clockwise.

3. Remove the SPRING HOUSING bolts and the
SPRING HOUSING, SPRING & SPRING SEAT.

4. Rotate the SPACER RING until the vent port aligns
with one of the holes in the side of the spacer
plate. Then bolt the spacer ring to the body with
two or three bolts. Insert a metal rod through the
vent port in the spacer ring and into the hole in the
spacer plate. Hold securely and loosen the upper
diaphragm plate with a pipe wrench.

5. Remove the upper diaphragm plate and the upper
diaphragm. Then remove the spacer ring.

6. Rotate the spacer plate and diaphragm counter­clockwise and remove the assembly.

7. Fasten the spacer plate securely in a vise and then
remove the lower diaphragm plate with a pin face
spanner wrench. Use extreme caution, wear gloves
or tap the spanner wrench with a hammer in order
to avoid cutting your hands on the diaphragm.

8. Replace the diaphragm in the reverse order. Apply
sealant to the fluid side of the diaphragm around
the center hole and the outer seating edge. The
valve stroke must be adjusted. Refer to the Mark 60
or Mark 50 I & M for the proper instructions under
the heading: DIAPHRAGM REPLACEMENT - B.
ASSEMBLY AND STROKE ADJUSTMENT.

Bulletin IM-MK53-0909

3170 Wasson Road • Cincinnati, OH 45209 USA

Phone [phone] • Fax [phone]

[e-mail] • www.jordanvalve.com