عضویت 
ورود اعضا
راهنمای خرید
M-XF Series Safety Excess Flow Valves0 pages
Safety Excess Flow Valves
M-XF Series
Field adjustable excess flow valve
Features
• Can be disassembled for repair or
inspection without removal from pipe line
• Field adjustable
• Broad adjustable range
• Meets OSHA requirements for safety shutoff valves
• Operates effectively with liquids or gases
• In-line flow
Applications
Note: All LPG tank cars and transport trucks are required by law
to have excess flow valves installed. In addition, state LPG
regulatory bodies require excess flow valves on all LPG storage
vessels, storing products for domestic delivery and consumption.
Operation
•
•
•
•
•
Fuel lines
Pollution control
Chemical processing
Gas and hydraulic lines
Petroleum and gas installations
Safety Excess Flow Valves
Malema’s valves provide instant shut off in the event of a hose
break or line failure, preventing the release of hazardous or
inflammable products to the area, which can result in a disatrous
fire or explosion and untold damage to personel and equipment.
Calibration Range *
Air:
0.5 to 40,000 scfm
Water: 0.1 to 2,500 gpm
* These ranges are over different valve sizes.
As the fluid enters the valve,
it flows through the orifice to
the outlet. The orifice and
tapered piston create a
venturi effect, accelerating
the flow through the valve.
At a preset flow rate, the
pressure differential offsets
the spring-loading of the
piston and shuts off the valve.
Fluid can flow through the
valve in either direction;
however, the flow will be
shut off in the direction
indicated on the valve.
Specifications
Set Point Accuracy:
Repeatability:
±10% maximum
± 5%
Material Versions *
• Bronze
• Carbon Steel
• Cast Iron
• Forged Steel
• 316 Stainless Steel
* Other materials available on request.
Illustrated is the M-XF Model.
Adjustment is achieved by means of an externally adjustable
screw that positions the pistons closer or farther away from the
orifice. Turning the adjusting screw clockwise to reduce the flow
area causes actuation at lower preset flows.
Port Sizes *
• 3/4”
• 1”
• 1 1/2”
• 2”
• 3”
• 4”
• 6”
• 8”
• 10”
(ANSI Flanged, FNPT, and Socket Welded port
types are available)
* Other sizes available on request.
malema flow sensors
Catalog # 246:
1
"
