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UMAC Excess Flow Valve UMAC Excess Flow Valves (EFVs) are similar
to electrical circuit breakers that trip when
electrical current exceeds the design limits.
EFVs automatically shut off, instantly, when
the gas flow to a residence or commercial
facility exceeds the preset flow value. UMAC
valves have a simple design that use the flow
of the natural gas as the sensing source. The
most common cause of excessive gas flow is
the rupture of service lines which can occur
during the excavation process.
Millions of UMAC EFVs are in service
around the world providing reliable,
trouble-free service to our customers. They are
designed to meet our customers standards.
Self-activating, quick operating shut-off
valve for service lines
Excess Flow Valves
Automatic Safety Cut-Off Valves for Natural Gas
Service Lines
UMAC
®
INCORPORATED
Tee Outlet (20, 25, 32 & 63 mm)
Series M40, M60, M75 & M175
In Tubing (25, 32 & 63 mm)
Series M60, M75 & M175
Benefits of UMAC EFVs
100% factory tested and certified
Normal operation after repairs are made
either by automatic pressure equalization
or manual pressure equalization via back
pressure
Compatible with meter sizes from G4
through G250
Pressure rated from 75 mbar to 10 bar
M60 and M75 steel models rated to 100 bar
Increase public confidence in gas
Provide safe working conditions for personnel
at scene of a service line break
Safeguard gas company against unwarranted
negative publicity and excessive liabilities
that result from gas leak emergencies
Fabricated with fitting and piping materials
from other manufacturers
Constructed of maintenance-free materials
Series M40
Series M60 and M75
Series M175
UMAC
®
INCORPORATED
17 Lee Blvd., Suite D

Malvern, PA 19355-1234

Toll Free: (800) 524-0566

Voice: (610) 407-7200

Fax: (610) 407-7211

www.umac.com
www
.umac.com
Regulator, Service
Line Failure or Impact
Earthquake or
Settling
Third Party Damage
Main and Service Tee
Main/Street
Tee Location
EXCESS FLOW
VALVE
Directional Drilling or
Digging a Post Hole
UMAC Excess Flow Valve 2/6/06 5:45 PM Page 1 250
200
150
100
0
Pressure Drop (mbar)
Flow (m
3
/h)
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95
52
1 bar
1.5 bar
2 bar
3 bar
4 bar
5 bar
250
200
150
100
50
0
Pressure Drop (mbar)
Flow (m
3
/h)
12.5 25 37.5 50 62.5 75 87.5 100 113 125
1 bar
1.5 bar 2 bar
3 bar
4 bar
5 bar
Series M40 - 20 mm
Shutoff Range (Trip Point) Between 225 and 275 mbar
Flow Range up to 175 mbar
Series M60 - 32 mm
Shutoff Range (Trip Point) Between 200 and 250 mbar
Flow Range up to 150 mbar
300
250
200
150
100
50
0
Pressure Drop (mbar)
Flow (m
3
/h)
25 38 50 63 75 88 100 113 125 138
1 bar
1.5
bar
2
bar
3 bar
4 bar
5 bar
170
70
250
200
150
100
50
0
Pressure Drop (mbar)
Flow (m
3
/h)
25 50 75 100 125 150 175 200 225 250 275 300
1 bar
1.5 bar
2 bar
3 bar 4 bar 5 bar
Series M75 - 32 mm
Shutoff Range (Trip Point) Between 275 and 375 mbar
Flow Range up to 210 mbar
Series M175 - 63 mm
Shutoff Range (Trip Point) Between 200 and 275 mbar
Flow Range up to 150 mbar
Meter Size
Vn m
3
/h[SC] at 1-5 bar
G16 25
Meter Size
Vn m
3
/h[SC] at 1-5 bar
G40 62.5
Meter Size
Vn m
3
/h[SC] at 1-5 bar
G65 70
Operating Pressure (bar)
Vn (m
3
/h) at 1-5 bar
1.0
157
1.5
181
2.0
193
3.0
228
4.0
252
5.0
274
UMAC
®
INCORPORATED
Excess Flow Valves
17 Lee Blvd., Suite D

Malvern, PA 19355-1234

Toll Free: (800) 524-0566

Voice: (610) 407-7200

Fax: (610) 407-7211

www.umac.com
UMAC Excess Flow Valve 2/6/06 5:45 PM Page 2