Heap & Partners are one of the worlds largest stockists of Saunders diaphragm valves Heap & Partners now supply a range of Spirax Sarco control valves Heap & Partners are however far more than just a distributor Indeed the companies links with the diaphragm valve go right back to P.K. Saunders original idea, when in 1933 Heap & Partners helped to finance the setup of the the Saunders Valve Company We have been stocking the Hindle ball valve range for over thirty years and have consequently built up a large knowledge base on the strengths of this valve