WEBANCOR

WEBANCOR AIR SHAFT PUSH BUTTON VALVES

ST-375 AND ST-125

(patent applied for)

FINALLY A SAFE VALVE FOR USE IN AIR SHAFTS.

A REGISTERED DESIGN BY WEB & CORE TECHNOLOGIES INC.

DESCRIPTION:

The WEBANCOR ST-125 AND ST-375 PUSH BUTTON Air Shaft Valves are designed to meet IAPA and OSHA requirement for use with compressed air over 35 psi. The ST-125 miniature valve has a 1/8 NPT thread and the ST-375 a larger valve has a 3/8 NPT thread. The two sizes cover just about all North American made Air Shafts. The ST-125 valve is used in small shafts up to 3" cores sizes. The ST-375 is used in larger shafts that hold more air, and require a faster flow rate. The 6" core shaft is a prime example of a shaft that holds a lot of air, and usually uses the larger valve. The steel push button is threaded onto the valve core, so it will not come apart like some other manufacturers valves that are just held together by an interference fit.

SAFETY:

The push button part of the valve is tapered to accept the rubber tipped inflator, and contains vent holes that lower the pressure of the escaping air if a finger dead-ends the valve. All valves are supposed to be released by a deflating tool, but as we all know, most times this deflating tool is a finger. When a standard non-vented push button valve is dead-ended by a finger, high pressure compressed air could be injected under the operators skin and into the blood stream. Air in the blood can cause an embolism, and death. Venting the air, lowers the pressure of the compressed air against the skin reducing the possibility of air injection.

A proper "vented" rubber tipped inflator should be part of the safety package. The standard rubber tips are not vented and as such will not meet the safety requirements. The rubber tipped inflators from WEBANCOR are vented in such a way as to work with the ST-125 and ST-375 valves, sealing the vent holes in both the valve and the inflator.

USE IN CORE CHUCKS:

WEBANCOR does not recommend that any push button valve be used in Core Chucks. Chucks have a very small air chamber and push button valves are slower to seal than the "SCHRADER" or tire type valve, which means that any small loss of pressure will greatly compromise the gripping power of a chuck.
The tire type WEBANCOR # 1641 is the only type recommended for chucks.
Use of a push button valve in a WEBANCOR chuck will void the warranty.

THREAD SEALING:

Air shaft valves contain air pressures up to 90 psi. and must be installed with a thread sealing compound. Use of sealing tape is not recommended since the tape can" string off" and get in the O'ring preventing an effective seal. Air shafts are often required to hold large loads without slipping, so it is recommended that air shafts be inflated to 85-90 psi. This is known as "shop air pressure" and will hold a roll up to the design limits of the shaft without slipping. This will also help increase the life of the shaft since the internal parts are held firmly, decreasing the wear on them.

INFLATORS:

This inflator is designed with a visual aid to show the operator when an air shaft is inflated to the correct pressure. The visual aid shows RED until the correct pressure is reached and then shows GREEN. It is an internal part of the body and is not as susceptible to breaking, nor is as clumsy as an externally fitted Gauge. The FG-2000 is available for both the push button valves(order FG-2000ST) and also for the "SCHRADER" type of valve (order FG-2000TV).

CORE SHAFTS AND CHUCKS-BOWED ROLLS