Gas Handling Equipment
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Gas Handling Equipment Accessories Cylinder Connections Cylinder connections are used for connecting various items of gas handling apparatus (such as pressure regulators or pigtails) directly to high pressure gas cylinders. The actual connection varies depending on the gas in the cylinder and is designated by a three digit code (CGA Connection Number) as set forth in Compressed Gas Association publication V-1. Cylinder connections consist of a CGA nut and CGA nipple and in some cases require a washer for sealing purposes. Praxair offers cylinder connections in a variety of configurations and materials. One configuration, available in either brass or type 316 stainless steel, features a check valve housed within the CGA nipple. This configuration restricts flow to only one direction, and prevents “backflow” from the process to the cylinder. Also offered are special type 316L stainless steel cylinder connections which end in a male vacuum-type face seal fitting for use in systems utilizing VCR® or VCR® compatible type fittings. Pressure Range CGA Nipple Brass Brass Type 316 Stainless Steel Type 316 Stainless Steel Type 316L Stainless Steel Monel CGA Nut Brass Brass Type 316 Stainless Steel Type 316 Stainless Steel Type 316 Stainless Steel Monel Check Valve Seat NA EPDM NA Viton® NA NA “(CGA)” shown above indicates that the various CGA connections, listed in the Ordering Information, are used to make up complete part numbers. Ordering Information – Brass and Monel Brass with Check Valve Outlet Part Number Connection 1/8" NPT male – 1/8" NPT male – 1/4" NPT male PRSSG6650-320CV 1/4" NPT male PRSSG6650-326CV – – 1/4" NPT male PRSSG6650-346CV 1/4" NPT male PRSSG6650-350CV 1/4" NPT male – 1/4" NPT male PRSSG6650-510CV 1/4" NPT male PRSSG6650-540CV 1/4" NPT male PRSSG6650-580CV 1/4" NPT male PRSSG6650-590CV 1/4" NPT male – – – Outlet Part Number Connection – – – – 1/4" NPT male PRSSG6652-320 1/4" NPT male – – PRSSG6652-330 1/4" NPT male – 1/4" NPT male – – – 1/4" NPT male – 1/4" NPT male – 1/4" NPT male – 1/4" NPT male – – PRSSG6652-660 – PRSSG6652-670 Outlet Connection – – 1/4" NPT male – 1/4" NPT male – – – – – – – 1/4" NPT male 1/4" NPT male * Connection is chrome-plated brass. Ordering Information – Cylinder Connections (Stainless Steel) Type 316 Stainless Steel Type 316 SS with Check Valve Outlet Part Number Connection 1/8" NPT male – 1/4" NPT male PRSSG6651-320CV 1/4" NPT male PRSSG6651-326CV 1/4" NPT male PRSSG6651-330CV 1/4" NPT male PRSSG6651-346CV 1/4" NPT male PRSSG6651-350CV 1/4" NPT male PRSSG6651-510CV 1/4" NPT male PRSSG6651-540CV 1/4" NPT male PRSSG6651-580CV 1/4" NPT male PRSSG6651-590CV 1/4" NPT male PRSSG6651-660CV 1/4" NPT male PRSSG6651-670CV 1/4" NPT male PRSSG6651-677CV 1/4" NPT male – 1/4" NPT male – 1/4" NPT male – 1/4" NPT male – 1/4" NPT male – 1/4" NPT male – 1/4" NPT male – * Connection is compatible with 1/4" VCR® fittings. ** Washers are constructed of lead and can also be used with CGA 110 connections. Type 316L Stainless Steel Outlet Part Number Connection – – 1/4" NPT male PRSSG6651-320VM 1/4" NPT male PRSSG6651-326VM 1/4" NPT male PRSSG6651-330VM 1/4" NPT male PRSSG6651-346VM 1/4" NPT male PRSSG6651-350VM 1/4" NPT male PRSSG6651-510VM 1/4" NPT male PRSSG6651-540VM 1/4" NPT male PRSSG6651-580VM 1/4" NPT male PRSSG6651-590VM 1/4" NPT male PRSSG6651-660VM 1/4" NPT male PRSSG6651-670VM 1/4" NPT male – – PRSSG6651-678VM – PRSSG6651-679VM – – – – – – – – – – Outlet Connection – 1/4" male Vacuum* 1/4" male Vacuum* 1/4" male Vacuum* 1/4" male Vacuum* 1/4" male Vacuum* 1/4" male Vacuum* 1/4" male Vacuum* 1/4" male Vacuum* 1/4" male Vacuum* 1/4" male Vacuum* 1/4" male Vacuum* – 1/4" male Vacuum* 1/4" male Vacuum* – – – – –