CORROSIVE GAS REGULATORS
Model CRH
Type 316 Stainless Steel, Positive Seal, (Tied Seat), High Flow Regulators

The special internal design makes these corrosive-resistant regulators extremely reliable for use with so-called “dirty gases such as Hydrogen Chloride, Sulfur Dioxide or Chlorine. It features a large seat and attached poppet (tied seat) design which reduces its susceptibility to clogging from particulate matter. In the unlikely event that a seat leak occurs from contamination or other sources, the regulator provides for positive shut-off by pulling the poppet tighter against the seat as pressure rises. The large Cv factor on this regulator also makes it an excellent choice for corrosive gas applications requiring high flow rates.

• Type 316 Stainless Steel Bar Stock Construction provides maximum corrosion resistance.
• High Purity Design assures maximum diffusion resistance and permits vacuum purging of regulator.
• Tied Seat (tied diaphragm) ensures positive shutoff if particulate matter should lodge in the seat, a common problem with corrosive gases.
• Diaphragm Seal Outlet Valve maintains gas purity.
• Unique Regulator Design allows regulator to be used at very low inlet pressures.
• 21⁄2" Stainless Steel Gauges read easily for more precise settings.
• Threaded Holes in Rear of Regulator permit front panel mounting.

• Bonnet Vent Connector provides a 1⁄8" NPT female port allowing bonnet to be connected to a vent line or disposal system as a precaution in the unlikely event of a diaphragm failure.
• Packed 316 SS Needle Valve in place of standard diaphragm seal valve, provides flow control at an economical price.
• Internal (Inboard) Helium Leak Test and Test Report determines inboard leak rate; test report certifies leak rate of less than 2 x 10^–8 sccsair equivalent.
• External (Outboard) Helium Leak Test and Test Report determines leak rate of gas from regulator to atmosphere; test report certifies leak rate of less than 5 x 10^–8 sccs air equivalent.
  

Table I