Operating instructions

SHERWOOD LPG PRODUCTS
Overview
Overview
General
We engineer and manufacture Sherwood LPG valves to the highest industry
standards. Our valves are tested and listed by Underwriters Laboratories Inc.
and ASME. Our line of valves includes:
t Cylinder and Service Valves
t Multi-Purpose Valves
t Filler Valves
t
Liquid Withdrawal Valves
t Pressure Relief Valves
We make Sherwood valves for a full range of commercial, industrial, and
domestic applications, including installations in engine fuel, fork lift trucks,
and recreational vehicles as well as domestic tanks.
Pressure Relief Valve Service Life
All pressure relief valves, whether designed as an individual unit or as an
integral part of another valve, contain similar design features and have
similar functions. They all utilize the same basic operation principles,
and the same maintenance guidelines apply.
The life of a Sherwood pressure relief valve is affected by many variables,
including climate, air pollution, gas purity, and other factors. Therefore,
our valves must be routinely inspected according to industry standards.
Sherwood recommends that our valves be replaced after 10 years of use.
This section of our catalog does not cover all aspects of inspection and
maintenance of pressure relief valves. For more detailed information on
these subjects, please refer to the following:
1. CGA Pamphlet S-1.1, Pressure Relief Device Standards -
Cylinders, Section 9.1
2. NPGA Certified Employee Training Program (CETP) and other guidlines
3. NFPA Pamphlet #58, Storage and Handling of Liquefied Petroleum Gases
4. NFPA Pamphlet #59, LP Gases at Utility Gas Plants
Safety Guidelines for Cylinder Valves
Cylinder valves serve many purposes, including vapor withdrawal and
shutoff, liquid withdrawal and shutoff, filling cylinders, releasing pressure,
and liquid level indication. Because of the hazards involved in possible
malfunction of this type of valve, all cylinder valves must be inspected on
a regular basis, particularly before filling cylinders, to ensure that no gas
escapes. Cylinders must not be overfilled.
Customers using LPG cylinders are not always aware of the hazards of LPG.
Since LPG dealers are the primary customer contact, the dealer has an
obligation to warn customers of these potential hazards and ensure that
they receive proper safety instructions regarding the use and storage
of cylinders (see the Customer Safety Section found with the Sherwood
warranty, page 4).
Manufacturing Date
The manufacturing date is stamped on the wrench flats of most Sherwood
valves. Pressure relief valves have this date stamped in the body of the valve.
The manufacturing date of all Sherwood valves is coded in one of six ways
(see Table 1 on page 13).
t-FBLJOHHBTDBODBVTFmSFTPSFYQMPTJPOT
t0OMZUSBJOFEQFSTPOOFMTIPVMEXPSLPOHBTTZTUFNT
t*OTQFDUHBTTZTUFNTSFHVMBSMZ
t3FQMBDFFRVJQNFOUBTSFRVJSFE
All Safe, Inc. 1-866-958-3473