Wedge Gate Valves Clause Samples
Wedge Gate Valves. Wedge Gate Valves shall be of the Waterworks Pattern Sluice Valve type and be manufactured to a standard of not less than that specified in SABS 664. The following special requirements shall be met:
a) The lugs on the gate and the spindle are to conform to 3.2.3 of SABS 664 and are to be machined to a good fit and finish.
b) Valve trim shall be either Type B (Gun metal trim) or Type C (Stainless Steel trim) as specified in SABS 664 Clause
Wedge Gate Valves. Valve seat and gate rings shall be manufactured from bronze to BS 1400 LG2. Valves except flange faces shall be coated externally and internally with self-etching primer followed by one or more coats of fusion bonded epoxy material to give a total film thickness of at least 250 microns all applied in accordance with the manufacturer’s specifications. Valves where specified shall be supplied with fully enclosed, grease-packed, single-train spur gearboxes with a 3:1 or 4:1 ratio as specified. Where required bronze gate guides and shoes shall be fitted as additional. Integral mounted by-pass assemblies shall be fitted as additional where required.