As a part of a continuous commitment to product development the company reserves the right to alter the specification of its products without prior notice Sheet Ref. CSMANHOLESAFETY - May 2006 - Revision 0 BLIND BOLT HOLES AND WEBS CAST Recessed centrebolt ensures that emergency ventingvia thespring loaded fill cap iseffective even if the tanker has rolled upside down. Many competitive designs do not include this which means that the tanker could explode if on fire and overturned. 5 F0512 F0337 F0338 F0355 F0339| MANHOLE COVER SAFETY FEATURES 5 CAP AND OPENING Raised seal face prevents water dripping into tank compartment. 6 8 6 The fill opening is 10” (254mm) diameter to allow easy insertion of the loading arm drop pipe. 7 PRESSURE AND VACUUM VENT VALVE 2” High FlowPressure and VacuumVent Valve allows for a massive 7000 ft³/hr (198 m³/hr) of exhaust, and 3500 cubic feet of vacuum, ensuring that the tanker has adequate breathing in extreme climatic conditions. This vent is also designed to seal off to prevent product loss and consequent environmental damage in the event of a tanker overturning. 8 8 9 A shield protects the PV vent from damage by loading arm drop pipe. 9 The fill cap includes a water drainage lip to prevent either rain or wash water dripping into the compartment and contaminating the product when the lid is opened for loading etc. 8 7 2 STAGE OPENING 2 stage opening protects the operator against dangerous ‘kick-back’ that canbeexperienced due to build up of residual pressure. 10 10 EMCO WHEATON UK Limited Channel Road · Westwood Industrial Estate Margate, Kent CT9 4JR · UK Phone + 44 1843 221521 · Fax +44 1843 295444 www.emcowheaton.com · [email protected]
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