CGA/DISS 40 Series Standard Cylinder Connectors (Nipple, Nut and Gasket)
A DISS connection (Diameter Index Safety System, CGA V-1) joins a regulator or pigtail straight to the outlet of a semiconductor or high purity gas cylinder, and each DISS number fits only its own gas. The 40 Series is the standard connector set for it: nipple, nut and gasket, supplied to the DISS number stamped on the cylinder valve.
Key features
- DISS numbers 632 to 642 and 712 to 728, gas specific
- 1/4 in tube weld, face seal male or NPT male ends
- Nipple 316L stainless or VAR, gasket nickel or PCTFE
- Electropolished to Ra 0.2 micron, Ra 0.4 on NPT
- Made to CGA V-1, clean room packed, permanently marked
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Request a quoteCGA/DISS 40 Series connectors, the standard nipple, nut and gasket cylinder connector set that joins a regulator or pigtail directly to the DISS outlet of a semiconductor or high purity gas cylinder. The DISS connector is gas specific by design, so each number fits only its own valve outlet, and the range covers DISS numbers 632 to 642 and 712 to 728. End connections are 1/4 inch tube weld, face seal male or NPT male, with 3/8 and 1/2 inch tube weld on request; the nipple is 316L stainless steel or VAR, the gasket nickel or PCTFE, and the wetted surface is electropolished to Ra 0.2 micron, Ra 0.4 on the NPT version. Every connector is made to CGA V-1, inspected on its critical surfaces, clean room packed and permanently marked.
Specification
| Standard | CGA V-1 DISS |
|---|---|
| In/Out Connections | 1/4 in tube weld, 1/4 in face seal male or 1/4 in NPT male |
| Material | 316L stainless steel or VAR nipple, nickel or PCTFE gasket |
| Cylinder Connection | DISS numbers 632 to 642 and 712 to 728 |
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Common questions
- What is a DISS connection and when do I need one?
- DISS is the Diameter Index Safety System, part of CGA V-1 and widely used on semiconductor, analytical and corrosive gas cylinders. Every DISS number has its own nipple diameter and seat geometry, so a connection can only be made to the matching outlet. If the cylinder valve is stamped with a number from 632 to 642 or 712 to 728, this is the connector you need.
- Which DISS number do I need for my gas?
- CGA V-1 assigns the numbers by gas, and the number is stamped on the cylinder valve outlet. 632 covers the hydrides: silane, phosphine, arsine, diborane, germane and hydrogen selenide. 718 covers argon, helium, nitrogen, krypton, neon and xenon; 724 is hydrogen and carbon monoxide; 716 carbon dioxide and sulphur hexafluoride; 728 chlorine. Tell us the gas and the number and we supply the nipple, nut and gasket to suit.
- What is the difference between the 40 Series and the 30 Series?
- The 40 Series is the complete connector: nipple, nut and gasket, with a 1/4 inch tube weld, face seal male or NPT male on the equipment side and 3/8 and 1/2 inch tube weld on request. The 30 Series is the gasket on its own, nickel or PCTFE, the part that is replaced when the connection is remade. The nipple is 316L stainless steel or VAR, electropolished to Ra 0.2 micron, or Ra 0.4 on the NPT version, and every set is made to CGA V-1, clean room packed and permanently marked.
