Cylindrical Plug valves - Kompetenz in Armaturen

1 Installation, lubrication and maintenance manualCylindricalPlug valvesBRDR. CHRISTENSENS HANER A/SSkuderl se 4690 Haslev +45 56 36 36 36 Fax +45 56 36 36 group before the pressure test,the valve must be the pressure test, thevalve must be lubricatedagain whilst in the openposition. If possiblethe valve shouldremain in theopen positionuntil it is putinto 9001 CERTIFIEDD esign2 The BC lubricated plug valve group 1 is the ideal shut-off device for almost any medium,even under the most severe operating can be used in most places where fast, trouble-free and efficient sealing is required.

2 Thedesign is very compact, it requires little space to install and it can be mounted in anyposition basic operation of the BC valve is very simple, as the only moving part is the plug. Inopen plug position, the passage area is free and in line with the pipeline. On turning theplug 90 to closed valve position, the passage is shut off, thus providing efficient BC valve is furnished with a lubrication system which allows feeding special lubricantinto the lubrication, the grease is forced into a groove system where from it is distributed be-tween the seating faces of the valve body and those of the plug, forming a sealing and cor-rosion preventive lubricating film.

3 The plug is therefore surrounded by grease on all surfa-ces, which besides the two advantages already mentioned, provides for smooth-actingcontrol even after long periods of service big advantage of the BC lubricated valve is that a positive seal can be obtained easilywithout disturbing the operation, just by lubricating the BC group 1 valve is Cylindrical and fits into the body with close tolerance. The cylin-drical shape allows the plug to move freely up and down in axial direction, and still retainthe same tolerance between body and the top of the plug, the valve is provided with an O-ring seal, while at the bottom it isclosed by the bottom BC valve can be operated manually or by an electrical, pneumatic or hydraulic valves can be supplied as wrench operated or gear operated valves .

4 Smaller sizes areusually wrench wrench operated valves , the body is provided with a stop which in connection with astop on the stem limits the rotation of the gear operated valves , the top has a machined face where the gearbox is fitted. Therotation stop is located inside the the valves can be delivered with a top flange for mounting any kind of actuator. Ifthe valve is supplied with such a top flange, the lubrication point is located on the side ofthe valve body instead of the on the top of the Body8 Gasket9 Cover12 Bottom screw13 Bolt16 Plug19 Sealing ring21 Check valve24 Lubricant screw24192181613987 Bottom design of smaller valves12 Valve lubrication4 The valve is grease packed, the plug rests on a lubricating film in the valve lubricant has three functions: to protect the internal closing surfaces of the valve fromcorrosion, to seal the valve, and to contribute to low operating torque.

5 With an eye toachieving the best possible action, it is therefore important to re-lubricate the BCH valves type 1 can be lubricated by use of either special lubricant sticks or alubrication gun, which is the recommended to page 7 for information of how to choose the right lubricant for your between re-lubricationsThe interval and quantity of lubricant for re-lubrication depends on the working conditions,in particular the temperature, the operating frequency, the medium, and the need fortightness. A high working temperature dries up the cases where the medium is non aggressive and the temperature is low, the need for re-lubrication will be small.

6 It is a matter of experience, but as a guideline and starting point,the values in the table below can be C - 90 C90 C - 120 C120 C 150 C150 C - 180 C180 C - 200 CWorkingtemperature32 F - 200 F200 F - 250 F250 F 300 F300 F - 350 F350 F - 400 FInterval24 months12-18 months8-12 months4-8 months2-4 months General instructionsThe valve must be in fully open position when it is re-lubricated. Where the medium iscompressible ( air or gas) re-lubrication can also take place in the fully closedposition. When lubricating a valve, a noticeable increase in lubricating pressure indicates that thevalve is now properly lubricated.

7 If this point is not reached at the expected time, theremight be a leakage of lubricant into the pipeline. Consult your dealer. Do not use a lubrication pressure that is too with lubricant sticksLubricating can also be effected by lowering the lubricating screw into the lubricant cham-ber. In doing so, the lubricant under screw is pressed into the lubricating channels in the lubricant chamber is done by unscrewing the lubricating screw, inserting a newlubricant cartridge and then screw the lubricating screw back lubricant sticks are mainly used to lubricate a small number of valves and valves ofsmall sticks are available, depending of the size of the lubricating of lubricant screwStick sizePacking sizeValve size (guide line)M8No.

8 620 15-20mm / DN 1 M12No. 1014 32mm / DN 1 M15No. 1310 40-65mm / DN 1 2 M20No. 187 80-175 / DN 5 -7 Valve lubrication5 Lubrication by gunLubrication is carried out with a BC-Lubricant gun (manually with type BC-1 or pneumaticwith type BC-2, see page 7). These guns works in a pulsating manner, which improves thedistribution of the lubricant in the lubricating channels. Do not use other types of tube of the lubricant gun has a push-on-head for direct connection to the valvelubricating nipple or lubricant not lubricate too fast - the lubrication must be allowed to distribute not lubricate with a higher pressure than stated in the table possible, make a few minor movements of the plug to further the distribution of the lubri-cant on the sealing valves with more than one lubricant point.

9 One half of the lubricant is distributed at thevalve top while the other half is distributed at the valve of lubricant for each valve sizeValve size(body) ofstrokesIndica-torunitsValve size(body) ofstrokesIndica-torunitsInchmmcm3BC-1BC- 2BC-2 Inchmmcm3BC-1BC-2BC-2 151,319 2255028500,50 201,5110 2506134610,611 251,8111 2756838680,681 322,5212 3007944790,791 404214 3509754970,972 505316 400112621121,122 657418 450137761371,373 809520 500148821481,484 100137130,1324 6001891051891,895 1252212220,2228 7002271262272,276 1502715270,2730 8002631462632,637 1753218320,3236 9003021683023,028 2004022400,4040 10003421903423,42 The BC-1 gun gives approx.

10 Cm3 per stroke, the BC-2 approx. 1 cm3 Max. allowable lubricating pressure for the BC-2 body materialClass designated valvesPN Designated valvesSteelValve pressure in psi + 3990 psiValve pressure in bar + 275 barDuctile IronValve pressure in psi + 3260 psiValve pressure in bar + 225 barGrey cast ironValve pressure in psi + 2175 psiValve pressure in bar + 150 barNote : For safety reasons the lubrication pressure stated must not be exceeded. Particular caution must bedisplayed when lubricating cast iron plug lubrication6Re-lubrication of gearThe lubrication of the gear follows the principle of dry lubrication, meaning that a layer ofantiseizing paste with a content of molybdenum disulphide is applied to bearings, teeth andworms.