Model T1661ST

Polycarbonate bonnet will not chip, break or fade.
The non-adjustable "shut-down" safety is built into the body of the regulator where it cannot be removed or easily circumvented. In event of a failure of the regulator seat this safety will respond instantly, isolating the product container from potentially dangerous high pressure. The product container pressure level will not exceed the factory set blow-off of 55 - 65 PSIG.
The high pressure ports have left-hand female threads to prevent their use as a lo-pressure outlet
The non-removable adjusting screw is designed so that when it is turned all the way in the maximum downstream delivery pressure will not exceed 50 PSIG.
Internal relief valve opens whenever delivery pressure exceeds set pressure by 15 PSIG. This feature serves as a warning that the seat or diaphragm may be worn or damaged and should be replaced.
Sintered metal flow control filter in the inlet nipple to prevent dirt and other particles from damaging internal regulator parts.
Permanent Quad-Ring Seal on inlet nipple helps eliminate a source of leaks... no need to use a new fiber washer each time tank is changed.
Outlet features NADS 1600C shutoff which eliminates a source of gas leaks. The ball-type check valve helps prevent product back-up into the regulator, a common cause of malfunction in the regulating and relief valve parts. Hose barb end designed for use with 5/16" I.D. pressure tubing.