1.1 Introduction
We appreciate your business and your choice of Welker products. The installation, operation, and maintenance liability for this
equipment becomes that of the purchaser at the time of receipt. Reading the applicable
Installation, Operation, and
Maintenance
(IOM)
Manuals
prior to installation and operation of this equipment is required for a full understanding of its
application and performance prior to use.*
If you have any questions, please call Welker at 1-281-491-2331.
*The following procedures have been written for use with standard Welker parts and equipment. Assemblies that have been modified may have additional
requirements and specifications that are not listed in this manual.
1.2 Product Description
The Welker
RV-1
,
RV-2
, and
RV-3
Relief Valves are designed to protect instruments and regulators from overpressurization. The
RV-2CP
is designed to be used in place of a rupture disc to protect cylinders from overpressurization. Unlike a rupture disc, the
RV-2CP will only relieve enough pressure required for it to reseat, thus limiting the amount of product discharged. As an added
safety feature, the RV-2CP outlet can be vented to a safe location.
l
The RV-1 is specifically designed to relieve moderate capacity instruments in the 0–200 psig range.
l
The RV-2 is specifically designed to relieve low capacity instruments in the 0–1900 psig range.
l
The RV-2CP is specifically designed to relieve low capacity cylinders in the 0–1900 psig range.
l
The RV-3 is specifically designed to relieve high capacity instruments in the 0–200 psig range.
Welker may custom design the RV-1, RV-2, RV-2CP, and RV-3 to suit the particular application and specifications of each customer.
1.3 Specifications
The specifications listed in this section are generalized for this equipment. Welker can modify the equipment according to your
company's needs.
Please note that the specifications may vary depending on the customization of your equipment.
Table 1: RV-1 Specifications
Materials of Construction
316/316L Stainless Steel, PTFE, and Viton®
Others Available
Maximum Allowable Inlet Pressure
2500 psig (
172 barg
)
5000 psig (
344 barg
) [Standard]
6000 psig (
413 barg
)
Connections
Inlet:
¼" MNPT (Standard) or ¹⁄₈" MNPT
Outlet:
Atmospheric, ¼" FNPT, or ½" FNPT
Spring Range
0–50 psig (
0–3 barg
)
0–100 psig (
0–6 barg
)
0–200 psig (
0–13 barg
)
Options
Pre-Set Relief
Sulfinert®-Treated Wetted Parts
CE Compliance
CRN Certification
NACE Compliance
SECTION 1: PRODUCT INFORMATION
4
IOM-033
MODELS: RV-1, RV-2, RV-2CP, and RV-3
REV: F
13839 West Bellfort Street, Sugar Land, TX 77498
welker.com
Service Department 281.491.2331
