CHLORINE OR SULFUR DIOXIDE             
A-300 or A-300-S – Low Pressure Check Valve Assembly, 100 ppd
A-300T or A-300T-S – Secondary Low Pressure Check Valve Assembly, Tapped, 100 ppd
A-300-V1 or A-300-V1-S – 100 ppd (2000 gms/hr) S/O Pressure Relief (Vent) Valve Assembly
A-300-V2 or A-300-V2-S – 250 ppd (5000 gms/hr) S/O Pressure Relief (Vent) Valve Assembly
A-300-V3 or A-300-V3-S – 500 ppd (10 kg/hr) S/O Pressure Relief (Vent) Valve Assembly
A-300-V4 or A-300-V4-S – 1000/2000 ppd (20/40 kg/hr) S/O Pressure Relief (Vent) Valve Assy
A-305 Chlorine Only – High/Low Pressure Check Valve Assembly with ball check
A-306 Chlorine Only – Dual Check Valve Assembly for A-940
A-320 or A-320-S – Low Pressure Check Valve Assembly, 250 ppd (5000 gms/hr)
A-320T or A-320T-S – Secondary Low Pressure Check Valve Assy, 250 ppd (5000 gms/hr)Tapped
A-330 or A-330-S – Secondary Check Valve Assembly, High Pressure, 3/8” Tubing
A-331 or A-331-S – Secondary Check Valve Assembly, High Pressure,1/2” Tubing
A-332 or A-332-S – Secondary Check Valve Assembly, High Pressure, 5/8” Tubing
A-350 or A-350-S – Low Pressure Check Valve Assembly, 500 ppd (10 kg/hr)
A-350T or A-350T-S – Secondary Low Pressure Check Valve Assy, 500 ppd (10 kg/hr) Tapped
A-949 Chlorine Only – Dual Check Valve Assembly for A-950
A-2000 Chlorine Only – 1000/2000 ppd Check Valve Assembly