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172-65694MA-01 (BD800) 25 July 2018

Bypass Blow Valve

BD800

Copyright © 2018 by TLV CO., LTD.

All rights reserved

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Содержание BD800

Страница 1: ...172 65694MA 01 BD800 25 July 2018 Bypass Blow Valve BD800 Copyright 2018 by TLV CO LTD All rights reserved ...

Страница 2: ...rt of this long life product the main components of the valve are replaceable In conventional valves when dust or scale adheres to the seating surface of the valve seat section leakage occurs eventually leading to erosion and ultimately the valve will no longer function properly This bypass blow valve utilizes a special material for the valve stem and valve seat sections and together with its uniq...

Страница 3: ...ols Indicates a DANGER WARNING or CAUTION item DANGER Indicates an urgent situation which poses a threat of death or serious injury WARNING Indicates that there is a potential threat of death or serious injury CAUTION Indicates that there is a possibility of injury or equipment product damage WARNING DO NOT use for any other fluids than applicable fluids DO NOT use for toxic flammable or otherwise...

Страница 4: ... to malfunction or the discharge of fluids Do not use excessive force when connecting threaded pipes to the product Over tightening may cause breakage leading to fluid discharge which may cause burns or other injury Do not place weight on top of the spanner cap The product is not designed to be climbed on by people Failure to observe this precaution may result in damage to the spanner cap or injur...

Страница 5: ...conditions quoted CAUTION Use only under conditions in which no freeze up will occur Freezing may damage the product leading to fluid discharge which may cause burns or other injury CAUTION Refer to the product nameplate for detailed specifications Model Production Lot No Max Operating Pressure PMO Max Operating Temperature TMO Nominal Diameter Valve Class Body Material Configuration NOTE Gland pa...

Страница 6: ... Take measures to prevent people from coming into direct contact with product outlets Failure to do so may result in burns or other injury from the discharge of fluids CAUTION Do not use excessive force when connecting threaded pipes to the product Over tightening may cause breakage leading to fluid discharge which may cause burns or other injury CAUTION Installation inspection maintenance repairs...

Страница 7: ...ischarge of fluids causing burns other injuries or damage CAUTION Removing the Spanner Cap Remove the spanner cap by turning it counter clockwise Spanner Cap Adjusting the Valve Aperture Place the spanner cap as shown in Figure A adjust the valve aperture by turning the valve stem The adjustment can also be made by using the narrow open end of the spanner cap as shown in Figure B NOTE The valve st...

Страница 8: ...ning it around the piping or flange as shown below Restricting movement of the spanner cap prevents the valve from being operated erroneously Spanner Cap Hole Wire Steel Wire Piping Relation between CV Kvs Values and No of Turns of the Valve Stem 3 5 3 2 5 2 1 5 1 0 5 0 0 1 2 3 4 5 3 5 3 2 5 2 1 5 1 0 5 0 0 1 2 3 4 5 3 5 3 2 5 2 1 5 1 0 5 0 0 1 2 3 4 5 Cv US No of turns Cv UK KV No of turns No of ...

Страница 9: ... pressure may lead to discharge of fluids causing burns other injuries or damage CAUTION Periodic Inspection Periodic inspection for the following points is recommended at least twice per year Leakage when the valve is fully closed Leakage from the gland holder The spanner cap has a blow hole at the bottom Fluid jets from the hole when there is leakage from the gland Take safety precautions when p...

Страница 10: ...per part of the gland holder has stopped do not tighten any further Make sure that the valve stem can still turn after the gland holder is tightened Contact TLV if leakage does not stop even after retightening 3 After retightening is complete replace the spanner cap ...

Страница 11: ...er torque Bonnet Pull up and remove Align the embossed lettering on the bonnet and body and reattach NOTE When assembling the bonnet to the body tighten the bonnet nuts making sure that the valve stem is seated on the valve seat with no built up of rust and scale When tightening the bonnet nuts tighten all of them evenly and gradually to the proper torque to avoid uneven tightening When the second...

Страница 12: ...crew removal tool B into removal tool A When removal tools A and B are inserted to the bonnet the gland packing is caught by the tip of removal tool and can be removed by lifting up the removal tool Make sure to remove dust and scale from inside the bonnet Removal Tool B Removal Tool A Gland Packing 3 Reinsert the valve stem into the bonnet then insert new gland packing into the bonnet Align the g...

Страница 13: ...172 65694MA 01 BD800 25 Jul 2018 12 Exploded View Spanner Cap Bonnet Nut Gland Holder Gland Packing Bonnet Valve Stem Bonnet Gasket Valve Seat Valve Seat Gasket Bonnet Bolt Body Inlaid in the bonnet ...

Страница 14: ...leakage by following the steps described below The figure below illustrates scale accumulation between the valve seat and valve stem resulting in the valve not being able to fully close 1 Remove the spanner cap 2 Turn the valve stem counter clockwise one to two times 3 Turn the valve stem clockwise right rotation until it cannot be turned any further 4 Repeat steps 2 and 3 two to three times When ...

Страница 15: ...t and scale erosion corrosion etc clean those surfaces Clean the valve seat and valve stem if leakage does not stop after cleaning replace with a new valve seat and or valve stem contact TLV Fluid is leaking from the gland section The gland holder is loosened Retighten the gland holder clean or replace with new parts contact TLV The valve stem does not move The valve stem is clogged with rust and ...

Страница 16: ...mproper installation use handling etc by other than TLV CO LTD authorized service representatives 2 Malfunctions due to dirt scale rust etc 3 Malfunctions due to improper disassembly and reassembly or inadequate inspection and maintenance by other than TLV CO LTD authorized service representatives 4 Malfunctions due to disasters or forces of nature 5 Accidents or malfunctions due to any other caus...

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