Jordan Valve Mark 53 Series – Differential Back Pressure - Manual (Page 2)

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 counter-
clockwise 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.
3170 Wasson Road • Cincinnati, OH 45209 USA
Phone 513-533-5600 • Fax 513-871-0105
[email protected] • www.jordanvalve.com Bulletin IM-MK53-0909
Spring
Housing
Flow-Thru
Connection
(both sides)
Spacer Ring
Spacer Plate
Lower
Diaphragm
Plate
Vent Port
Upper
Diaphragm
Plate