Rainer Flow Technology, RFT, valves, check valves, wafer Check Valves, non-return valves, twin plate valves, duo check valves, lugg valve, valves scotland, valves uk, retainerless valves






RFT Wafer Check Valve

RFT is a highly experienced and innovative engineering company. We specialise in producing fully finished valves.


Our products are machined, assembled, tested and certified entirely in the UK and meet all required industry standards.

About Us

RFT Valves
RFT Valves
RFT Valves


Valve Bodies
Nitron XRM - PMI Analyser

Casting Expertise


Quality & Testing

RFT work in close  conjunction with our parent company Drysdale Brothers, a Lloyds approved foundry, to produce top quality castings. Utilising MagmaSoft simulation software to optimise the casting process ensures a high integrity product from the offset.

To ensure the pressure integrity of our valves, RFT has state-of-the-art seat lapping machines for valve bodies and lapping tables for valve plates. This ensures the best possible quality and flatness for the lapped surfaces on all our metal-seated valves.

In accordance with ISO 9001 all Incoming goods are subject to full inspection to ensure compliance with drawings and standards. Chemical analysis is verified using our NITON XRF - PMI Analyser.

Hydrostatic Pressure Tested Valves
Laser Etched Valves
3D Modelling Valves

Hydrostatic Testing

Laser Etching

3D Modelling

We test 100% of our finished products to international standards. All tests are documented and certified. We have recently purchased a Ventil pressure-testing station, allowing us to test hydrostatically up to ANSI 2500lb, as well as undertake low-pressure air and gas-seat testing to API 598.

RFT has invsted in the latest Laser etching technology for Identifying our products. Laser etching is permanent, tamper proof and resistant to damage from chemicals and abrasion.

To develop Valves that meet all our customers’ needs, RFT has its own on-site design and engineering department. We use state-of-the-art 3D modelling to develop all our products, no matter the size and pressure class.


Retainerless Valves

Standards & Materials

Our 'retainer-less' design for dual-plate check valves has special characteristics. The outlet flange face is uninterrupted and makes full contact with the mating flange face, ensuring that the integrity of the gasket is not jeopardised in any way.

RFT Retainerless Valves

Our 'retainer-less' dual-plate check valves are manufactured in accordance with API 594, ASME B16:34 and tested to API 598. We stock a comprehensive range of valves up to the 600lb pressure class in ASTM A 352 LCC low-temp carbon steel, ASTM A 351 CF8M stainless steel and C95800 aluminium bronze body materials.


Other exotic materials and pressure classes for specialised applications are available by request. Stock metal seated valves can be modified with soft seating materials: EPDM, NBR and VITON. They're also available with Stellite 6 hard facing on the seat upon request.


Our stock range of products can be modified to suit most international flange standards.

Product Range

We offer dual plate check valves with our patented ‘retainer-less’ design in the following sizes and specifications – see table below.

For full details on our product range, please refer to the Standard Materials and Specification document in our downloads section.


2” through 24″

API594, ASME B16:34, Testing API598

150, 300, 600, 900, 1500, 2500

Standard Wafer Pattern, ‘U’ Section Lugged, Solid Lugged

LCB, LCC, WCB, CF3M, CF8M, A995 Gr4A, Gr5A,Gr6A  (Other materials upon request)

Metal to metal as body

13% chrome overlay, 316st.st overlay, Stellite 6 HF


Flat Face, Raised Face, Ring Type Joint, Hub Ends




Body Styles

Materials Cast

Standard Seat

Overlay Seat Options

Resilient Seat




RFT are compliant with all industry standards. Certificates are available for download here, along with our full product range.

PED MH RFT Valve Product Range


We welcome all enquires, please get in touch and we'll be happy to help.

Contact RFT
Contact RFT

+44 (0)141 774 5292


Make an enquiry


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Rainer Flow Technology

Block 23 Unit 2, Weardale Lane

Queenslie Industrial Estate

Glasgow, G33 4JJ

RFT works closely with our parent company, Drysdale Brothers.
Visit them here

RFT Valves
Retainerless Valves
Wafer Check Valves

Copyright © RFT 2014