PV-94129B
Revised 04-00
Catalog Section 55
(00-02-0126)
Pneumatic Valves for
Fuel Gas Shutoff
Models M2582-P
and M5180-P
■
Pneumatically Open and Shut Off Fuel Gas
Automatically or Semi-automatically
■
■
Pneumatic Control Pressure Can Be
Air, Gas or Oil
Models for 2 in. or 1 in. (51 mm or
25 mm) Fuel Gas Lines
MURPHY
MATIC
Model M2582-P
®
bar] and fully opens the seat at 3 psi (21 kPa) Control Pressure (Maximum):
Description
[.21 bar]. The valve can be manually opened
with lever and latched against inlet pressure
of 100 psi (689 kPa) [6.89 bar]. The latch will
release after pilot pressure reaches 2.5 psi (17
kPa) [.17 bar].
M2582-P: 75 psi (517 kPa) [5.17 bar]
The M2582-P and M5180-P are pneumatical-
ly controlled fuel shut-off valves that open
and close automatically or semi-automatical-
ly. The pneumatic control pressure can be air,
oil or gas. A manual lever aids in opening the
valve when control pressure is insufficient. A
gas escape vent, when properly vented and
maintained, releases trapped gas from the
valve after shutoff.
M5180-P: 80 psig (552 kPa) [5.52 bar]
How to Order
To order, use the diagram below.
Specifications
Valve Body: Sandcast aluminum
(alodined for corrosion resistance).
Optional steel body available on M5180-P
models only (see How to Order).
______ – __
Model
Basic Operation
Automatic: As the control pressure/vacuum
increases the valve will open. When the control
pressure/vacuum decreases, the valve will close.
M2582-P
M5180-P
Valve Seat: Buna-N
Valve Inlet Pressure (Maximum):
M2582-P: 80 psi (552 kPa) [5.52 bar]
M5180-P: 100 psi (689 kPa) [6.89 bar]
Semi-Automatic: If the control pressure/vacuum
is too low and the valve does not open automat-
ically, it can be opened manually by lifting the
built-in lever arm and setting the latch. The
latch resets automatically when control pressure
rises enough to release it.
Body
Blank = Aluminum
2 = Steel (applies to M5180-P)
Parts Exposed to Gas Line Flow:
M2582-P:
• Aluminum
Warranty
• Buna-N
M2582-P is for 1 in. (25 mm) gas lines. It auto-
matically opens at 2 psi (14 kPa) [.14 bar] and
fully opens the seat at 3 psi (21 kPa) [.21 bar].
The valve can be manually opened with the
lever and latch against inlet pressure of 80 psi
(552 kPa) [5.52 bar]. The latch will release after
pilot pressure reaches 2.5 psi (17 kPa) [.17 bar].
A limited warranty on materials and workmanship
is given with this FW Murphy product. A copy of
the warranty may be viewed or printed by going to
• 302, 303, and 17-7 PH stainless steel
M5180-P:
• Aluminum (Steel optional)
• Buna-N
• 302, 303, 304, and 416 stainless steel
Control Diaphragm: Flexweave polyester
fabric and Buna-N elastomer.
The M5180-P is for 2 in. (52 mm) gas lines.
It automatically opens at 2 psi (14 kPa) [.14
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