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2"- 24" (50mm-600mm)
Dorot is proud to offer a high quality line of butterflyvalves to meet the requirements of today’s market.Combining years of field experience, research anddevelopment, Dorot has designed many unique featuresin the Series DBV-WF/LU not previously available. The results are longer service life, greater reliability, easeof parts replacement and interchangeability of components.
Design Features
Dorot’s Series DBV - WF valve is a safer version with flangelocating holes (optional), and the Series LU is the companionlug version for dead - end service and other flangerequirements. All Dorot valves are tested to 110% of fullpressure rating before shipment. |
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A major design advantage of Dorot valve product linesis international compatibility. The same valve is compatiblewith most world flange standards - ANSI Class 125/150,BS 10 Tables D & E, BS4504 NP 10/16, DIN ND10/16,AS 2129 and JIS 10. In addition, the valves are designedto comply with ISO 5752 face-to-face and ISO 5211actuator mounting flanges.
Therefore, one valve design can be used in many differentworld markets. Due to a modular concept of design,all Dorot handles, manual gear operators mount directlyto Dorot valves. No brackets or adapters are required.Dorot interchangeability and compatibility offers you thebest in uniformity of product line and low-cost performancein the industry today.
Product Advantages
- Wafer Lug style valve to be installed between twoflanges in any position in the line.
- Sealed stem and gear provide longer life span.
- Low torque required to activate the valve underpressure due to low friction stem bushing.
- When installed in a manhole or in hard to reachlocation, the extra long neck allows easy activation.
- A square stem makes gear box or extension shaftre-assembly easy.
Application
- Pumping stations
- Irrigation main lines and block isolation
- Municipal water lines
- Industrial water pipes
- Cooling towers
Installation
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Position the disc in the partially open position. |
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Place the valve body between the pipe flanges and installflange bolts. Do not use flange gaskets. |
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Carefully open the disc to the fully-open position, ensureproper alignment with the adjacent pipes. |
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Leave disc in the fully-open position and tighten flange boltsper required specifications. Once bolts are tightened,then carefully rotate the disc to “closed” position. |
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Horizontal position of the stem is preferred. |
Maintenance and Repair
The high performance features minimize wear and maintenancerequirements. No routine lubrication is required.All components - steam, disc, seat, bushing steam seal, etc., arefield replaceable, no adjustment is needed. If components requirereplacement, remove the valve from the line by placing the discnear the closed position, spread the flanges, support the valve,and then remove the flange bolts. No valve maintenance, includingremoval of manual or power actuators, should be performed untilthe piping system is completely depressurized.
Selection Data
RECOMMENDED SPECIFICATIONS FORDOROT SERIES DBV-WF/LU SHALL BE:
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Epoxy coated cast iron, wafer or lug bodies. |
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Series LU: Lug-type with flange-locatingholes to ANSI 125/150, BS 10 Tables D & E, BS4504 PN 10/16, DIN ND10/16, AS 2129and JIS 10 standards. |
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Mechanically-retained Stem in body neck.No part of stem or body is exposed to line media. |
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For weld-neck and slip-on flanges-seattotally encapsulates the body, no flangegaskets are required. |
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Spherically machined, hand polished andmaximum sealing capability. |
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Non-corrosive bearings. |
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Bi-directional flow, tested to 110% ofpressure rating. |
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Bi-directional pressure rating:- 2”-12” valves are rated 230 PSI/PN16- 14”-20” valves are rated 150 PSI/PN10For Lug bodies used at dead-end service,with downstream flanges, pressure ratings areequal to bi-directional ratings as stated above. |
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For Zero-Outlet pressure:- 2”-12” valves are rated 75 PSI/PN6- 14”-20” valves are rated 50 PSI/PN4 |
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No field adjustment is necessary to maintainoptimum field performance.
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The valve shall be Dorot Series DBV WF/LUlug or equal. |
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