Tel: +44 (0) 2890 020190
Some of the other products/services we provide...

In addition to butterfly valves Frenstar supply a range of ancillary products to fully compliment the range.

PMI = Positive Material Identification

Positive Material Identification is (in this case) the use X-ray to verify metal alloys, establishing composition by reading the quantities by percentage of its constituent elements. In short ensuring adding security and peace of mind that you are getting the right material for each component 100% of the time. Frenstar own an Niton XRF XL 2 analyzer. As part of our strict, internal quality control we conduct PMI on the majority of critical valve components. Many of our staff are fully trained and certified radiographic protection supervisors. We can provide PMI certification upon request and we are happy to offer this service/facility on a sub-contract basis.


Frenstar have a number of paint facilities available – We can supply valves factory painted in accordance with project specifications or, in the case of stock products we can lean on a number of quality sub-contracted facilities. We understand that painting requirements can be stringent and we draw from our experience to ensure that, if required we can comply with Norsok, Maersk and other strict standards/specifications/systems with, if needs be NACE (or similar) inspection. In short whether you require a simple color change to any RAL number or an all out project specific paint system, Frenstar can cater for your requirements.

Custom Fabrication & Machining

Sometimes problems have to be solved using some fabrication ingenuity. Frenstar can supply custom extensions (standard and oil filled), linkages, brackets/couplings, locking devices, Spacer pieces etc to suit almost any requirement.As well as fabrication we can also provide machining capabilities to allow for modifications such as through drilling.


Full electric, pneumatic and hydraulic actuation packages available. Our knowledgeable team can supply actuation from a multitude of reputable manufacturers. Full packages including any ancillary switchboxes, solenoid valves, regulators and other controls - Specific requirements for safe area, ATEX and Ingress protection will be quoted and supplied accordingly.

Other Services

Manual Valve Accessories – Stainless steel gearboxes, Stainless steel levers, Limit switch boxes, Interlocking devices, Chainwheels are just some additions which complement our range

Export Packing

Export packing can be supplied to suit all requirements. All of our export packing is to ISPM15 as standard.


In the developing industries it is common place to see demanding bolting/fastener requirements. Frenstar has vast experiences in such requirements and can easily supply and change out fasteners to Super duplex, HDG (Hot Dipped Galvanized) steel, Aluminum bronze to name just a few. For stock valves we have standardized on Stainless steel 316 (A4 or B8M) non-wetted fastners.

Installation / Start up – If required installation bolting , flanges and gaskets can be supplied. We supply IOM manuals with all our products as standard.

Please contact us for more information

Tel: +44 (0) 2890 020190
Unit 4, 38-40 Duncrue Crescent
Belfast, BT3 9BW
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