Materials of Construction. The materials of construction for butterfly valves shall be in accordance with Table 5-2. Table 5-2 Materials of Construction for Butterfly Valves Item PN 1.6 Rated Valves PN 1.0 Rated Valves Body SGI IS 1865 Grade 500/7 CI IS 000 Xxxxx XX 000 Xxxx XXX IS 1865 Grade 500/7 CI IS 210 Grade FG 260 Shaft Stainless Steel BS 970, Grade 431 S29 Stainless Steel BS 970, Grade 431 S29 Body and Disc Seat Stainless Steel AISI 316 Stainless Steel AISI 316 Bearing Steel backed PTFE (Teflon) Steel backed PTFE (Teflon) Internal Fasteners Stainless Steel SS316 Stainless steel SS316 The butterfly valves can alternatively be supplied in fabricated steel with material components of Body and Disc confirming to IS 2062 Gr. B / IS 2002. A minimum corrosion allowance of 3 mm shall be added. Butterfly valves conforming to IS 13095 will also be accepted. Gearboxes for Butterfly Valves Gearboxes shall be of the self-locking type, with a continuous indicator. Traveling nut and screw type of gearboxes shall not be acceptable. Each gearbox must conform to the provisions of AWWA C504. The rated torque capability of each operator shall be sufficient to seat, unseat and rigidly hold in any intermediate position the valve disc it controls under the operating conditions specified. Operating torque must be as per requirements given in AWWA C504. The operator shall be of worm and worm wheel design, self-locking type with or without an additional spur gear arrangement to ensure that the effort on the hand wheel is limited to the pull specified. All valve operators shall be equipped with adjustable mechanical stop-limiting devices to prevent over- travel of the valve disc in the open and closed positions. Either end of the worm shaft must be provided with a needle roller bearing to take the lateral thrust. The housing for the gearing must be enclosed and sealed in such a way that there is no leakage of oil / grease even after long period of idleness and there shall be no ingress of rainwater. Operator for valves, which are likely to be submerged in water for any period of time, shall be watertight. The hand wheel may be provided with an extension for easy grip. The hand wheels must have a provision for locking with a chain and pad lock. All operators when fitted to the valve shaft shall ensure clockwise closing and this shall be indicated on the housing. A mechanical indicator is to be provided to show disc position and end of travel. Sluice Valves Features of Construction Sluice valve shall ge...
Materials of Construction. The materials of construction for sluice valves shall be in accordance with Table 5-4. Table 5-4 Materials of Construction for Sluice Valves Item Material Body, Wedge, Dome For PN 1.0 - CI IS 210 Grade FG 260 For PN 1.6 - SG Iron IS 1865 Grade 500/7 Hand Wheel Cast Iron IS 210 Grade FG 200 Stem IS 6603, SS 4Cr17 Ni12 Mo2 / AISI 316 Body Seat Ring and Wedge Ring IS 318 Grade LTB 2 Shoe Channel and Stem Nut IS 318 Grade LTB 2 Back Seat Xxxx IS 318 Grade LTB 2 Pressure Reducing Valves Scope Diaphragm controlled pressure reducing valves, suitable for automatic reduction of downstream pressure shall be provided and installed. The downstream pressure shall remain constant to the set value, independently of flow variations or upstream pressure variations. The pressure rating of the valves shall be PN 1.6 (16 kg / cm2 operating pressure). Product features Product features shall be as specified below.
Materials of Construction. The materials of construction for Air Valves shall be in accordance with Table 5-6. Table 5-6 Materials of Construction for Air Valves Item Material Body, Cover and Cowl CI IS 210 Grade FG 260 High Pressure Orifice and Plug Bronze or Stainless Steel Xxxx Bronze High Pressure Ball Rubber Low Pressure Ball Vulcanite Low Pressure Seat Ring Dexine (Nitrile Rubber) Fire Hydrants Fire hydrants shall be as per Standard specification. Dismantling Joints Dismantling joints shall be a double-ended flanged adapter that allows for longitudinal adjustment in piping systems where flanged end pipe is utilized. This special shall provide flanged end pipe interfaces with valves, meters or other specials and allow for dismantling of the joint without dismantling of the connecting piping. Dismantling joints shall be fusion bonded epoxy (FBE) coated in the factory prior to shipment to the Project Site. Dismantling joints shall be installed as shown on the Drawings or as specified. Dismantling joints shall be Style 131 as manufactured by the Dresser Inc., USA, Advance Valves Ltd, Fouress Engineering Ltd, Indian Valve Pvt Ltd, Kirloskar Brothers Ltd, or equivalent. Drawings and Information to Be Provided By Contractor For each valve and set of bellows being furnished, the following shall be submitted for approval by the Employer’s Representative, prior to shipping any of these items to the project site:
Materials of Construction particularly those upon which the strength and durability of the structure may depend, shall be subject to inspection and testing to establish conformance with specifications and suitability for uses intended.
Materials of Construction a. All materials used in construction shall confirm to the Technical Requirements & Performance Standards mentioned in Schedules I. However, the Concessionaire shall have freedom to choose best quality building materials of the standard desired for a state of the art Ecotourism & Adventure Park.
Materials of Construction a. All materials used in construction shall confirm to the Technical Requirements & Performance Standards mentioned in Schedule III. However, the Concessionaire shall have freedom to choose best quality building materials of the standard desired for a Project.
Materials of Construction. The ductwork from the inlet air filter to the air compressor, the discharge piping from the air compressor to the ammonia/air mixer, together with the air heater and discharge air filter are all stainless steel.
Materials of Construction. 3.1.1 New Materials The only new material of construction required is hydrophilic polyurethane foam. The Westaim part number is A2005.
Materials of Construction. 1.3.1 The materials used in the construction of the Acticoat Burn Dressing are: High density polyethylene mesh — Part number: A1000 70/30% Rayon/polyester gauze — Part number: A2000 Silver targets — Part number: A0100 Specifications for these materials are located in the QSI Specification Control database. Vendors approved to supply the different raw materials for the burn dressing are contained within Westaim Biomedical’s Approved Supplier List. PRODUCT SPECIFICATIONS
Materials of Construction a. Bolts, nuts, washers, flange backing rings, and other miscellaneous metal components not specifically addressed elsewhere in these Specifications shall be Type 304 or 316 stainless steel.
