Vilter VSM 71-701 Operation And Service Manual Download

Page: 201 / 244

Refrigerating Specialties Division

STOP / STRAINER VALVE

Port Size 13-100mm (1/2”- 4”)
FOR AMMONIA, R12, R22, R502
AND OTHER COMMON REFRIGERANTS

FEATURES

BULLETIN 86-00

March 2003

Installation, Service and Parts Information

I S O 9 0 0 1 C E R T I F I E D

• Handwheel or Seal Cap
• Replaceable PTFE seat disc
• Full-ported angular seat allows washing action
• Positive shut-off
• Low pressure drop
• 50 & 100 mesh stainless steel screen
• Stainless steel stem with positive back seating
• Drain connection for safe cleaning
• Maximum Safe Working Pressure 400 PSIG
• Fluid Temperature Range -65°F to +350°F

Fig. 1

SCREEN
ASSEMBLY

DRAIN CONNECTION

STAINLESS

STEEL STEM

HANDWHEEL

SEAL CAP

ANGULAR SEAT

PTFE SEAT

DISC

Description

The Refrigerating Specialties combination stop/strainer
shut-off valves are designed to provide all the benefits of a
typical valve and strainer assembly within a single valve
body. This unique combination valve decreases the
effects of pressure drop in a system by eliminating the
need for a separate strainer, while reducing system and
installation costs.

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 assembled, maintained, and operated in use
and service as specifically stated in Refrigerating Specialties Catalogs
or Bulletins for normal refrigeration applications, unless otherwise
approved in writing by Refrigerating Specialties Division. 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 that have been aftered,
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 merchantability or
warranty of fitness for a particular purpose and in no event is Refrigerating
Specialties responsible 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 connection
with any of it products.

Safe Operation (See also Bulletin RSB)

People doing any work on a refrigeration system must be qualified
and completely familiar with the system and the Refrigerating
Specialties Division valves involved, or all other precautions will
be meaningless. This includes reading and understanding
pertinent Refrigerating Specialties Division product Bulletins and
Safety Bulletin RSB prior to installation or servicing work.

Where cold refrigerant liquid lines are used, it is necessary that certain
precautions be taken to avoid damage that could result from liquid
expansion. Temperature increase in a piping section full of solid liquid
will cause high pressure due to the expanding liquid that can possibly
rupture a gasket, pipe or valve. All hand valves isolating such sections
should be marked, warning against accidental closing, and must not be
closed until the liquid is removed. Check valves must never be installed
upstream of solenoid valves, or regulators with electric shut-off, nor
should hand valve upstream of solenoid valves or downstream of check
valves be close until the liquid has been removed. It is advisable to
properly install relief devices in any section where liquid expansion
could take place.

Avoid all piping or control arrangements that might produce thermal or
pressure shock. For the protection of people and products, all
refrigerant must be removed from the section to be worked on before a
valve, strainer, or other device is opened or removed. Flanges with
ODS connections are not suitable for ammonia service.

310604