Refrigerating Specialties Division
8
Parker Hannifin Corporation • Refrigerating Specialties Division
2445 South 25th Avenue • Broadview, IL 60155-3891
Telephone (708) 681-6300 • Fax (708) 681-6306
Warranty
All Refrigerating Specialties products are warranted
against defects in workmanship and materials for a
period of one year from date of shipment from
originating factory. This warranty is in force only
when products are properly installed, field as-
sembled, maintained, and operated in use and ser-
vice as specifically stated in Refrigerating Special-
ties Catalogs or Bulletins for normal refrigeration
applications, unless otherwise approved in writing
by Refrigerating Specialties Company. Defective
products, or parts thereof returned to the factory
with transportation charges prepaid and found to be
defective by factory inspection will be replaced or
repaired at Refrigerating Specialties option, free of
charge F.O.B. factory. Warranty does not cover
products which have been altered, or repaired in the
field; damaged in transit, accidents, misuse, or
abuse. Products disabled by dirt or other foreign
substances will not be considered defective.
The express warranty above constitutes the only
warranty of Refrigerating Specialties products, and
is in lieu of all other warranties, expressed or implied,
written or oral, including any warranty of merchant-
ability or warranty of fitness for a particular purpose
and in no event is Refrigerating Specialties respon-
sible for any consequential damages of any nature
whatsoever. No employee, agent, dealer or other
person is authorized to give any warranties on
behalf of Refrigerating Specialties nor to assume for
Refrigerating Specialties any other liability in con-
nection with any of it products.
SYMPTOM
PROBABLE REASON
CORRECTION
Regulator does not
shut off flow
Diaphragm or seat dirty, damaged or
frozen
Clean or replace. Clean strainer
Diaphragm follower stuck or damaged Clean or replace. Install follower
carefully
Piston jammed with excess dirt
Remove and polish piston and bore
with crocus cloth. Clean valve and
strainer
Modulating plug leaking due to excess
dirt or damaged
Clean or replace. If used on liquid,
check for erosion due to excessive
flash gas by subcooling or by reducing
pressure drop across valve by providing
restriction at valve outlet.
Regulator does not
open
Pressure Regulator Diaphragm
ruptured or badly deformed
Replace. Make sure 2 diaphragms are
installed.
Diaphragm follower stuck, damaged or
frozen
Clean or replace. Install follower
carefully
Piston worn, too much clearance
Replace piston. Check for reason. If
used or liquid, check for flash gas.
Regulator Operation
erratic
Diaphragm or seat dirty, damaged.
Clean or replace. Clean strainer
Diaphragm follower has dirt on the
outside diameter or outside diameter is
damaged.
Clean or replace
Regulator too far oversized.
Check load. Replace with smaller
regulator or investigate use of Reduced
Capacity Plug Kit.
Pressure drop across
regulator too high
Inlet or outlet restricted
Check for restriction. Clean strainer.
Regulator too small
Replace with proper size regulator
Large amount of flash gas in liquid line Reduce flash gas by subcooling.
Reduce line restriction by increasing
line size, particularly at the regulator
outlet. Replace with larger regulator.
High pressure drop causes high rate of
expansion of gas at regulator outlet
Increase pipe size at the outlet of the
regulator
Regulator does not open all the way.
Check piston for wear. Replace, if
needed.
