Camlock Fittings Manufacturer in Taiwan

Our stainless and polypropylene series also run to G and H patterns. Ask us if you need those.

Because every body is cut to the same envelope, any coupler mates with any adapter, and it becomes easy to treat the four materials as four price points for one part. They are not. Each one fails differently, and the material you pick decides which failure you are exposed to. A compatibility chart answers for the body wall only; it says nothing about cracking that depends on temperature and stress, about static, or about the gasket.

Read the camlock fitting selection guide: types A to F, sizes and pressure →

Two of those are stress-corrosion mechanisms, and they behave differently from ordinary corrosion: there is no progressive wall loss to inspect against. The part looks serviceable until it splits. If ammonia appears anywhere in the system, brass is out, and that is not a concentration judgement. If 316 will run warm with chlorides present, ask the question before defaulting to it.

Camlock Gasket Selection: NBR, EPDM, FKM and PTFE

In most field failures we are asked to look at, the body is intact and the seal is not. NBR (Buna-N) is the standard fit on almost every coupling shipped anywhere, because it suits the largest share of duties — which means a coupling ordered on body material alone arrives with NBR whether or not the fluid suits it.

The trap is that NBR and EPDM are close to opposites. NBR handles petroleum oils, fuels and most hydrocarbons and is attacked by ketones, esters and strong oxidisers. EPDM handles ketones, many acids and hot water and is destroyed by petroleum oils — the exact duty NBR is good at. FKM covers aggressive solvents and higher temperatures at a cost step, and PTFE-encapsulated seals cover what nothing else will, with less resilience and a lower tolerance for repeated make-and-break.

On anything outside plain water, air and dry bulk, put the gasket in the purchase specification rather than leaving it to the factory default.

Where a Camlock Fitting Should Not Be Used

Cam and groove is a quick-release connection, and the same cam arms that make it quick are what limit where it belongs:

• Steam. Use a fitting designed for steam service. A cam arm can be knocked open, and the gasket materials above are not steam materials.
• Compressed gas at pressure. Stored gas energy released by an arm opening is a different hazard from a liquid line dropping pressure.
• Unattended pressurised lines without safety clips or pins. Where a line stays under pressure and no one is watching it, fit the locking hardware or use a bolted connection.
• Non-conductive flammable liquid through a polypropylene body. Resolve bonding and grounding around the plastic coupling rather than assuming continuity through it.

Camlock Fitting Pressure Rating by Size and Material

Maximum working pressure falls as bore increases, because the cam arms hold a larger sealing face against a larger force. These are the ratings for our range:

Working pressure, not burst. Figures assume ambient temperature, a gasket suited to the fluid and a correctly seated coupling with both arms fully closed. Polypropylene loses rated strength as temperature rises. For 1/2″ and for any duty above ambient, ask us for the figure against your actual combination.

Can You Mix Camlock Materials at the Same Joint?

Mechanically, yes — that is what the shared envelope guarantees, and mixed pairs happen constantly: a stainless adapter left on a tank outlet, an aluminium coupler on the hose. In a dry indoor duty it is harmless.

In a wet, salt-bearing or condensing environment it is a galvanic cell with the two metals in direct contact, and the less noble of the pair — the aluminium — carries the corrosion. This is one of the few failure modes avoidable by procurement discipline rather than engineering: keep coupler and adapter in the same material wherever the connection gets wet, and make it a rule rather than a preference, because the parts fit regardless and nobody at the hose rack will notice the mismatch.