INSTRUCTIONS
I. IMPORTANT – BEFORE INSTALLING
RVT-0219-I-1
SERIES “RVT” RELIEF VALVES
INSTALLATION AND MAINTENANCE INSTRUCTIONS
Series RVT relief valves will open when inlet pressure exceeds
the set pressure, when properly installed and used within the
recommended ranges of pressure, temperature, and chemical
compatibility. The ultimate determination of material
compatibility is previous successful use in the same application.
Call our Technical Support for information about your
application.
CAUTION: Series RVT is not a pop safety relief valve. It is not
intended for air or gas service. It does not regulate pressure
downstream of the valve. Connecting the outlet to a suction line
may cause air to be drawn into the line. Connecting the outlet to
a pressurized line or vessel may cause valve malfunction.
Plastic materials will degrade in ultraviolet (UV) light or sunlight.
Polypropylene and PVDF often look similar. Do not install in your
system if you are not sure.
II. INSTALLATION INSTRUCTIONS
Install the valve in the proper flow direction as indicated by the
flow label. The valve may be set vertically or horizontally.
A. THREADED CONNECTION
Apply a suitable thread sealant (for example, PTFE tape) to
male tapered threads to assure a “leak-tight” seal. Assemble
“hand-tight” followed by a quarter (1/4) turn with a strap
wrench. Do not over tighten or use pipe wrenches on plastic
pipe and components. CAUTION: PTFE tape will “string” as
pipe threads are joined. Loose “strings” could lie across the
seating surface and prevent the valve from completely closing.
To avoid this problem, clean out old tape, and do not apply
tape to the first thread.
CAUTION: Connect to plastic pipe and fittings only; when using
metal pipe, install an intervening plastic fitting. Metal pipe and
straight threaded pipe tends to cut, stretch, and distort the
plastic bodies, resulting in cracking or leaking over time.
NON-THREADED CONNECTIONS – For solvent cementing
or heat fusion, follow the instructions supplied with the cement
or fusion equipment, of contact your distributor.
MOUNTING: These valves are designed to be supported by
the piping. The piping must be properly supported, taking into
account the weight of the valve, piping, and process liquid.
BODY
MAT’L COLOR at 77ºF (25ºC) at 104ºF (40ºC) at MAX TEMP.
PVC DARK GRAY 150 PSI 10 Bar 106 PSI 7 Bar 34 PSI @ 140ºF 2 Bar @ 60ºC
CPVC LIGHT GRAY 150 PSI 10 Bar 120 PSI 8 Bar 37 PSI @ 180ºF 2 Bar @ 80ºC
Polypro TRANSLUC. WHITE 150 PSI 10 Bar 125 PSI 8 Bar 40 PSI @ 180ºF 2 Bar @ 80ºC
Kynar PVDF TRANSLUC. WHITE 150 PSI 10 Bar 120 PSI 8 Bar 22 PSI @ 280ºF 1 Bar @ 140ºC
PTFE OPAQUE WHITE 150 PSI 10 Bar 140 PSI 9 Bar 10 PSI @ 280ºF 69 Kpa @ 140ºC
MAXIMUM INLET PRESSURES for WATER*
*or compatible chemical – rating reduced for some applications. Not rated for suction or vacuum. Minimum
temperature 40°F (5°C). EPDM seals limited to 250°F (120°C), FKM to 300°F (148°C). See the Product Data Sheet
or consult our Technical Support staff for more information.
