Page 383 - Praxair - Specialty Gases and Equipment Reference Guide

Accessories

Cylinder Connections

Cylinder connections are used for connecting various items of gas handling SSCGA580
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 Brass CGA580
in a male vacuum-type face seal fitting for use in systems utilizing VCR or VCR
®
®
compatible type fittings. SSCGA660
Specifications Materials
n Pressure Range Part Number CGA Nipple CGA Nut Check Valve Seat
CGA 347, 680, 695 and 701: PRSSG6650-(CGA) Brass Brass NA
3001–5500 psig PRSSG6650-(CGA)CV Brass Brass EPDM
CGA 677, 702 and 703: PRSSG6651-(CGA) Type 316 Stainless Steel Type 316 Stainless Steel NA
5501–7500 psig PRSSG6651-(CGA)CV Type 316 Stainless Steel Type 316 Stainless Steel Viton ®
CGA 290, 510, 678 and 679: PRSSG6651-(CGA)VM Type 316L Stainless Steel Type 316 Stainless Steel NA
0–500 psig PRSSG6652-(CGA) Monel Monel NA
All Others: 0–3000 psig “(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 Brass with Check Valve Monel Teflon Washers
®
CGA Part Number Outlet Part Number Outlet Part Number Outlet (Package of 25)
Number Connection Connection Connection Part Number
170 PRSSG6650-170* 1/8" NPT male – – – – PRSSG3542
180 PRSSG6650-180 1/8" NPT male – – – – PRSSG3541
320 PRSSG6650-320 1/4" NPT male PRSSG6650-320CV 1/4" NPT male PRSSG6652-320 1/4" NPT male PRSSG6076
326 PRSSG6650-326 1/4" NPT male PRSSG6650-326CV 1/4" NPT male – – –
330 – – – – PRSSG6652-330 1/4" NPT male PRSSG6076
346 PRSSG6650-346 1/4" NPT male PRSSG6650-346CV 1/4" NPT male – – –
350 PRSSG6650-350 1/4" NPT male PRSSG6650-350CV 1/4" NPT male – – –
500 PRSSG6650-500* 1/4" NPT male – – – – –
510 PRSSG6650-510 1/4" NPT male PRSSG6650-510CV 1/4" NPT male – – –
540 PRSSG6650-540 1/4" NPT male PRSSG6650-540CV 1/4" NPT male – – –
580 PRSSG6650-580 1/4" NPT male PRSSG6650-580CV 1/4" NPT male – – –
590 PRSSG6650-590 1/4" NPT male PRSSG6650-590CV 1/4" NPT male – – –
660 PRSSG6650-660 1/4" NPT male – – PRSSG6652-660 1/4" NPT male PRSSG6075
670 – – – – PRSSG6652-670 1/4" NPT male PRSSG6075
* Connection is chrome-plated brass.
Section E – Gas Handling Equipment
Ordering Information – Cylinder Connections (Stainless Steel)
Type 316 Stainless Steel Type 316 SS with Check Valve Type 316L Stainless Steel Teflon Washers
CGA Part Number Outlet Part Number Outlet Part Number Outlet (Package of 25)
Number Connection Connection Connection Part Number
180 PRSSG6651-180 1/8" NPT male – – – – PRSSG3541
320 PRSSG6651-320 1/4" NPT male PRSSG6651-320CV 1/4" NPT male PRSSG6651-320VM 1/4" male Vacuum* PRSSG6076
326 PRSSG6651-326 1/4" NPT male PRSSG6651-326CV 1/4" NPT male PRSSG6651-326VM 1/4" male Vacuum* –
330 PRSSG6651-330 1/4" NPT male PRSSG6651-330CV 1/4" NPT male PRSSG6651-330VM 1/4" male Vacuum* PRSSG6076
346 PRSSG6651-346 1/4" NPT male PRSSG6651-346CV 1/4" NPT male PRSSG6651-346VM 1/4" male Vacuum* –
350 PRSSG6651-350 1/4" NPT male PRSSG6651-350CV 1/4" NPT male PRSSG6651-350VM 1/4" male Vacuum* –
510 PRSSG6651-510 1/4" NPT male PRSSG6651-510CV 1/4" NPT male PRSSG6651-510VM 1/4" male Vacuum* –
540 PRSSG6651-540 1/4" NPT male PRSSG6651-540CV 1/4" NPT male PRSSG6651-540VM 1/4" male Vacuum* –
580 PRSSG6651-580 1/4" NPT male PRSSG6651-580CV 1/4" NPT male PRSSG6651-580VM 1/4" male Vacuum* –
590 PRSSG6651-590 1/4" NPT male PRSSG6651-590CV 1/4" NPT male PRSSG6651-590VM 1/4" male Vacuum* –
660 PRSSG6651-660 1/4" NPT male PRSSG6651-660CV 1/4" NPT male PRSSG6651-660VM 1/4" male Vacuum* PRSSG6075
670 PRSSG6651-670 1/4" NPT male PRSSG6651-670CV 1/4" NPT male PRSSG6651-670VM 1/4" male Vacuum* PRSSG6075
677 PRSSG6651-677 1/4" NPT male PRSSG6651-677CV 1/4" NPT male – – –
678 PRSSG6651-678 1/4" NPT male – – PRSSG6651-678VM 1/4" male Vacuum* PRSSG6077
679 PRSSG6651-679 1/4" NPT male – – PRSSG6651-679VM 1/4" male Vacuum* PRSSG3543**
680 PRSSG6651-680 1/4" NPT male – – – – –
695 PRSSG6651-695 1/4" NPT male – – – – –
702 PRSSG6651-702 1/4" NPT male – – – – –
703 PRSSG6651-703 1/4" NPT male – – – – –
705 PRSSG6651-705 1/4" NPT male – – – – PRSSG6078
* Connection is compatible with 1/4" VCR fittings.
®
** Washers are constructed of lead and can also be used with CGA 110 connections.

E•382 1-877-PRAXAIR www.praxairdirect.com