Double Seal Caps

also known as inflate thru caps.

The Double Seal Inflate thru Caps, also known as VC12 or flow-through valve caps, Eliminates bruised knuckles or removing of the valve caps in bad weather. Automatic inflation systems lock right onto the inflate-thru cap. Seals like a high pressure cap, yet offers the convenience of an inflate-thru extension. The Double Seal Cap performs like a check valve-the seal becomes tighter in the event of a core failure. Heat resistant grommets provide additional protection for extended high temperature running. Features tough all metal housing, precision fit brass components and durable self sealing O-Ring. It is estimated that it takes 20 minutes to check the air pressure on the tires of a tractor trailer when each cap is removed and replaced. Because the Double seal cap permits gauging, inflating, and deflating without removal, it pays for itself the first time it’s used. While the Double seal cap was designed for use on tractor trailers, it is equally applicable to fourwheelers, who air down and air up with every trail run.

• A Time, Money, and Labor Saving Alternative to Common Valve Caps;

• Reduce Pressure Check Time by 65%;

• Designed for High Pressure Truck Tire Service;

• Fast Air Checks and No Lost Caps;

• Different Internal Structure (M or T) and Different Pin-top Shap (E, T or R) are also available;

double seal caps

Extair No. Description Picture
DSC01 Double seal caps with top O-ring sealing and taper top pin. double seal cap
DSC02 Double seal caps with middle core sealing and even top pin. inflate thru cap
DSC03 Double seal caps with top O-ring sealing and round top pin. flow thru cap


Tire Valve Extensions
Double Seal Caps
Plastic Extension Caps
Plastic Valve Extensions
Metal Extension Caps
Bent Valve Extenders
Metal Valve Extensions
Rubber Valve Extensions
Braided Valve Extensions
Half Rubber Extenders
Ultra Protective Extenders
Jumbo Rubber Extensions
Rubber Valve Extensions

Plastic Valve Extensions