TELESCOPIC VALVES
TELESCOPIC VALVES
1. GENERAL CONDITIONS
1.1. SCOPE. This ction covers Stainless S teel Telescopic Valves.
1.2. GENERAL. The equipment provided under this ction shall be fabricated, asmbled, erected, and placed in proper operating condition in full conformity with the drawings, specifications, engineering data, instructions and recommendations of the equipment manufacturer unless exceptions are noted by the engineer.
《做最好的自己》Telescopic valves shall be supplied with all the necessary parts and accessories indicated on the drawings, specified or otherwi required for a complete, properly operating installation, and shall be the latest standard product of a manufacturer regularly engaged in the production of telescopic valves.
什么是暖男The telescopic valves supplied under this ction shall be Series 80 Stainless Steel T elescopic Valves as manufactured by H.Fontaine Ltd.
1.3. QUALITY ASSURANCE.The manufacturer shall have experience in the production of substantially similar equipment and shall show evidence of satisfactory operation in at least 5 installations. The manufacturer's shop welds, welding procedures and welders shall be qualified and certified in accordance with the requirement of the latest edition of ASME, Section IX.
1.3.1.The manufacturer shall be ISO 9001 : 2000 certified.
1.4. SUBMITTALS. The manufacturer shall submit for approval by the purchar, drawings showing the principal dimensions, general construction and materials ud in the valve and lift mechanism.
2. PERFORMANCE
2.1. OPERATION. Telescopic valves shall be adjustable in all positions of travel.就职演讲稿
3. PRODUCT
3.1. TELESCOPIC VAL VES
3.1.1. GENERAL DESIGN. T elescopic valves shall be constructed entirely of stainless steel. All hardware shall be stainless steel.
3.1.2. BODY. The valve body shall be made of structural tubing or pipe.
3.1.3. TUBE. The tube shall be made of stainless steel. The inlet may be of the plain style, V-notch style, flared style, or weir box. Wear pads (guides) must be installed at the lower end of the tube to guide it inside the body and prevent metal-to-metal contact.
3.1.
4. GUIDE SEAL. A guide al must be provided where the tube enters the body. The UHMWPE guide al is part of the flange bolted to the stainless steel flange, which is welded to the outside pipe.
3.2. OPERATORS A ND STEM
3.2.1. STEM AND COUPLINGS. The operating stem shall be of stainless steel designed to transmit in compression at least 2 times the rated output of the operating manual mechanism with a 40 lbs (178 N) effort on the crank or handwheel.
The stem shall have a slenderness ratio (L/r) less than 200. The threaded portion of the stem shall have machined cut threads of the Acme type.
屈原的诗句Where a hydraulic, pneumatic or electric operator is ud, the stem design force shall not be less than 1.25 times the output thrust of the hydraulic or pneumatic cylinder with a pressure equal to the maximum working pressure of the supply, or 1.25 times the output thrust of the electric motor in the stalled condition.
3.2.2. STEM GUIDES. Stem guides shall be made of type 304L (or 316L) stainless steel and equipped with a UHMWPE bushing.
Guides shall be adjustable and spaced in accordance with the manufacturer's recommendation. The L/r shall not be greater than 200.
TELESCOPIC VALVES
3.2.3. STEM COVER. Rising stem gates shall be provided with a clear polycarbonate stem cover. The stem cover shall have a cap and condensation vents and a clear mylar position indicating tape. The tape shall be field applied to the stem cover after the gate has been installed and positioned.
3.2.伤感网名繁体字
4. LIFTING MECHANISM. Manual operators of the types listed in the schedule shall be provided by t
he gate manufacturer.
All bearings and gears shall be totally enclod in a weathertight housing. The pinion shaft of crank-operated mechanisms shall be constructed of stainless steel and supported by roller or needle bearings.
难得相聚Each manual operator shall be designed to operate the gate under the maximum specified ating and unating heads by using a maximum effort of 40 lbs
(178 N) on the crank or handwheel and shall be able to withstand, without damage, an effort of 80 lbs (356 N).The crank shall be removable and fitted with a
corrosion resistant rotating handle. The maximum crank radius shall be 15 inches (381 mm) and the
maximum handwheel diameter shall be 24 inches (610 mm).
4. MATERIALS
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TELESCOPIC VALVES
5. SCHEDULE
6. EXECUTION 6.1. INSTALLA TION. Gates and appurtenances shall be handled and installed in accordance with the
manufacturer's recommendations.
6.2. FIELD TESTS 6.2.1.Following the completion of each valve
installation, the valve shall be operated through at least two complete up/down cycles. If an electric or hydraulic
operator is ud, limit switches shall be adjusted
助眠穴位following the manufacturer's instructions.
