HH Valves are the only company manufacturing the genuine Hattersley Heaton design of Cast Steel Gate, Globe and Check Valves alongside our full range of low & high pressure Parallel Slide Gate Valves The valves fully comply with BS EN ISO 10434 (AP1600), AP16D, ASME B16.34, BS1873, BS1868, flanges to ASME B16.5 & EN1092-1, butt-weld to ASME B16.25 or other customer requirements. Located in Wigan in the north-west of England, HH Valves Limited was established in 2000, building on the 50-plus years that Hattersley Heaton Limited had been supplying valves to the oil, gas, petro-chemical and power generation industries. The Wigan plant has a fully equipped machine shop with facilities to manufacture, assemble and test valves up to 36” bore size and 10 tonnes in weight. The Wigan plant holds stock of the full gate globe and check range we offer in pressure classes 150, 300 and 600 in sizes up to 24”. In addition, we now have available a full range of HH Valves designed bolted bonnet Parallel Slide Valves in pressure classes 150,300,600,and 800 in sizes up to 36” bore. We also have HH valves designed forged steel pressure seal PSV’s in pressure classes 1690, 2850 and 4500 in sizes from ½” to 4”, and cast steel pressure seal PSV’s in pressure classes 1000, 1690, and 2850 in sizes from 5” to 24”. HH Valves is certified to ISO 9001:2000, and all its products have PED approval