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 to the requirements of BS EN ISO9001 and the European Pressure Equipment Directive 97/23/EC.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.Our web site will assist you in obtaining further information about our products and services alternatively you can contact us directly where we will be pleased to discuss with you any requirements you may have for valves, valve spares or valve refurbishment.