Aqua Environment 635 635 Series Back Pressure Regulator 1/2" NPT High Flow

Also known as a priority valve, the model 635 is a fully balanced economical regulator. It is similar to model 211 regulator but is capable of much higher flows. It is used primarily on compressors to maintain back pressure on filters and separators thus improving their efficiency as much as 1000 %. The stainless steel metal to metal seat is designed to be self cleaning and prevent freeze up. It maintains constant back pressure (set pressure) independent of outlet pressure. When outlet pressure (such as in a tank being filled) reaches set pressure the regulator opens fully permitting unrestricted flow. Normally the valve is set for back pressures of 1500 to 6000 PSI. However, it can be operated with set pressures as low as 150 PSI. Lighter than standard springs can be ordered to improve low pressure operation.

Features:

• Back pressure regulator
• 1/2 in. NPT
• High flow

Installation

Use a suitable pipe thread sealant such as teflon tape on the inlet and outlet ports. Connect the inlet to the source gas such as a compressor. If the regulator is installed in a piping line insure it is adaquately supported or adjacent piping is supported so any possible force on the regulator or piping will not damage or break it. The 1-1/4" by 12 pitch thread on the spring housing at the top of the regulator can also be used for mounting. A 1-1/4" hole in a mounting plate or panel will support the regulator using either a standard jam nut or p/n 952 mounting nut. (The 952 nut is smaller than a standard nut.) The regulator is NOT shipped oxygen clean and should NOT be used for oxygen service as provided.

Operation

In operation the back pressure regulator will maintain it's set pressure upstream and allow just enough gas flow to hold this pressure. The set pressure can be adjusted by loosening the 3/8" jam nut and turning the adjusting screw. Set pressure is pressure at the inlet port when gas is flowing through the regulator.

For more information, please see Data Sheet