Please find following a list of companies & websites which we hope may prove of further use to any persons interested in researching further into various types & manufacturers of industrial valves:- - The British Valve & Actuator Manufacturers Association's website - Safety Systems Uk website (was Bailey Birkett): primarily manufacturers of safety valves, reducing valves, & parallel slide valves - Nabic safety valve's website - Spirax Sarco manufacturers of numerous steam products - National Quality Assurance's website. Whittle Valves ISO 9001 & OHSAS 18001 approval body - A general engineering website, includes a free download of a very useful unit conversion programme (Engnet Tools) - German manufacturers of assorted valves - British manufactures of assorted valves - British manufactures of primarily gate & globe valves - (Was Hopkinsons) Manufacturers of various valves - Samson control valves website