We offer expertly designed and manufactured twin and single ferrule compression fittings. These fittings give fantastic performance in areas where high pressure, temperature and corrosion are the main challenges.

Our stainless steel instrumentation fittings include branch tees, stud standpipes, couplings, elbows, crosses and more.

Twin Ferrule Compression Fittings

Ringlok twin ferrule OD compression fittings are available in a full range of metric and imperial sizes and thread forms.

Single Ferrule Compression Fittings

The Duoloc product is available in 316 stainless steel and a comprehensive range of metric and imperial sizes and thread forms.

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Ringlok Imperial & Metric Charts

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Duoloc Imperial & Metric Charts

Information on gauging, assembly, material specification and safety can be found on our website.

Alternatively, we offer free technical advice to all customers by email: enquiries@waverleybrownall.co.uk

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See where our Duoloc and Ringlok fittings have been used in our CASE STUDIES, including Offshore platforms and the Conoco Phillips Humber Gas Refinery.

Straight coupling dimensions for our fitting in the single ferrule compression range.

Our Duoloc range has many fittings available, all supplied with compression nuts in stainless steel.

Diagram A

Waverley Brownall also offer reducing couplings, male and female adaptors and bulkhead couplings.

The fittings within Duoloc come with NPTF, BSPT, BSP thread types in metric and imperial sizing.

Straight Coupling Dimensions

Imperial Dimension Chart

OD Tube “	Part Number	G“	H“	Hex A/F
1/8	1/1 SC	0.876	0.218	0.562
3/16	3/16 SC	0.909	0.218	0.562
	For 1/8″ and 3/16″ see assembly page 7
1/4	2/2 SC	0.812	0.218	0.562
3/8	3/3 SC	0.937	0.281	0.750
1/2	4/4 SC	1.046	0.296	0.875
3/4	6/6 SC	1.234	0.390	1.125
1	8/8 SC	1.406	0.437	1.500

Metric Dimension Chart

OD Tube	Part Number	G (mm)	H (mm)	Hex A/F
6mm	6M/6M SC	23.0	5.0	14.0
8mm	8M/8M SC	25.0	4.5	17.0
10mm	10M/10M SC	27.0	5.0	19.0
12mm	12M/12M SC	28.0	6.0	19.0
15mm	15M/15M SC	28.0	6.0	24.0
16mm	16M/16M SC	29.0	6.8	27.0
18mm	18M/18M SC	30.0	8.5	28.5
20mm	20M/20M SC	31.0	9.8	33.0
22mm	22M/22M SC	35.0	9.8	33.0
25mm	25M/25M SC	35.0	9.8	38.0

The part numbers listed in these charts can be used for references when seeking a fast quotation. Part numbers for all of our single ferrule fittings can be found in our Duoloc catalogue. Material as standard is stainless steel 316.

Compression Fittings and Valves

Fast delivery UK and internationally
Manufactured to order or ex-stock
Material default 316 stainless steel, however, corrosion resistant materials can be used on request for your couplings
Full compression range of single and twin ferrule fittings, an alternative to Swagelok and Parker instrumentation

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Speak to us today on enquiries@waverleybrownall.co.uk

Stainless Steel Instrumentation Fittings

Single Ferrule Compression Fittings

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Straight Coupling Dimensions, Stainless Steel Compression

Straight Coupling Dimensions

Compression Fittings and Valves