Midget Air Valves
Stainless steel trim standard

Orifice Sizing Information

Orifice Diameter Max. Working Pressure
1/8" 50 lbs.
3/32" 85 lbs.
1/16" 150 lbs.
3/64" 200 lbs.
1/32" 300 lbs.

Crispin Midget Air Valves are chosen for use in venting trapped air in hot water systems by being installed at the high points of the line, thereby resulting in an increase of the B.T.U. output. The Crispin Midget Air Valve is equally well designed for venting cold water, pertoleum products and many other liquids of varying specific gravities. The Midget is also ideal for automatic priming of vacuum primed pumps. A vacuum check is available if desired for attachment to the valve outlet to prevent air from re-entering the system.
All Crispin valves are designed for a cold water working pressure of 300 PSIG

Parts List

Part No. Item Material
1 Valve Seat Stainless Steel
2 Plunger Button BUNA-N
4 Valve Lever Stainless Steel
5 Screw (Drive) Stainless Steel
6 Ball Float Stainless Steel
7 Hinge Pin Stainless Steel
7A Pin Clip Stainless Steel
8 Hinge Butt Stainless Steel
9 Bolts (6) Steel
10 Screw Stainless Steel
11 Flange Cast Iron
12 Body Cast Iron
13 Flange Gasket Armstrong
14N Nipple Steel
14V Vacuum Check Valve Brass

*Part No's 14N % 14V are optional at customer's request. Approximate weight - 6 lbs.

Model Information

Size of Valve 3/8" 1/2" 3/4" 1"
Model No. M3 M5 M8 M10
NPT-OUTLET 3/8" 3/8" 3/8" 3/8"
Height 5-9/16" 5-9/16" 5-9/16" 5-9/16"
Width 5" 5" 5" 5"
Weight 6 lbs. 7 lbs. 7 lbs. 8 lbs.

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Last modified: July 01, 1999