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Consolidated

™

1811 Series

Safety Valves

Instruction Manual (Rev. E)

Baker Hughes Data Classification : Public

Содержание Consolidated 1811 Series

Страница 1: ...Consolidated 1811 Series Safety Valves Instruction Manual Rev E Baker Hughes Data Classification Public...

Страница 2: ...UIREMENTS FOR OPERATION OF OTHER EQUIPMENT AT THE SITE THESE INSTRUCTIONS DO NOT PURPORT TO COVER ALL DETAILS OR VARIATIONS IN EQUIPMENT NOR TO PROVIDE FOR EVERY POSSIBLE CONTINGENCY TO BE MET IN CONN...

Страница 3: ...nter for assistance All the USCS values are converted to metric values using the following conversion factors USCS Unit Conversion Factor Metric Unit in 25 4 mm lb 0 4535924 kg in2 6 4516 cm2 ft3 min...

Страница 4: ...oning a Ring Lap 14 E Spindle Runout 15 F Spring and Spring Washers 15 XII Inspection and Part Replacement A General Information 16 B Specific Steps 16 XIII Reassembly 20 XIV Setting and Testing A Ste...

Страница 5: ...some instances of human hazards the pictorial may instead depict what preventive measures to take such as wearing protective equipment The bottom panel may contain an instruction message on how to av...

Страница 6: ...the valve is removed Exercise care when examining a safety valve for leakage Prior to each actuation assure that no personnel are near the valve Steam escaping from the valve during actuation can poss...

Страница 7: ...r personal safety nor valve safety will be jeopardized by the method and or tools selected Contact Baker Hughes if there are any questions relative to tools methods The installation and start up of va...

Страница 8: ...sure existing at the outlet of a safety valve device due to pressure in the discharge system Blowdown Blowdown is the difference between actual popping pressure of a safety valve and actual reseating...

Страница 9: ...ated lift is the design lift at which a valve attains its rated relieving capacity Safety Valve A safety valve is a pressure relief valve actuated by inlet static pressure and characterized by rapid o...

Страница 10: ...sed to prevent dirt from entering the outlet port while bolting in place While hoisting to the installation care should be exercised to prevent bumping the valve against steel structures and other obj...

Страница 11: ...Bushing 3 Disc 4 Lower Adjusting Ring 5 Lower Adjusting Ring Pin 6 Upper Adjusting Ring 7 Upper Adjusting Ring Pin 8 Yoke 9 Base Stud 10 Stud Nut 11 Spindle 12 Bottom Spring Washer 13 Spring 14 Top S...

Страница 12: ...hould be large enough to accommodate the full capacity of the valve without causing steam to escape by flowing backward through the drip pan In no case should the pipe connected to the valve be of a s...

Страница 13: ...dle to the top of the compression screw Record this for use in reassembly to restore the correct spring compression 7 Loosen the compression screw lock nut and remove the compression screw 8 Remove th...

Страница 14: ...ne time but having a sufficient supply on hand will save reconditioning time during a boiler outage After the boiler is back in operation the ring laps can be reconditioned on the flat lapping plate L...

Страница 15: ...his chamfer should not exceed 002 05mm If the seating surfaces require extensive lapping or reconditioning machining should be considered prior to lapping See Inspection Section XII B for criteria Cov...

Страница 16: ...found to be acceptable Other parts of the spindle not used as working surfaces may run out considerably more than 007 0 18 mm but this should not be regarded as unacceptable Although the upper thread...

Страница 17: ...sure HP version Disc 1811 LP LP FSD TD HP HP Table 2 XII Inspection and Part Replacement 1811 HP Flat Solid Disc Machining Dimensions Figure 9 HP Flat Solid Disc Table 3a Flat Seat Disc Replacement Cr...

Страница 18: ...shown in Figures 9 11 replacement with the current improved design Thermodisc is recommended The 1811 HP LP Thermodisc is designed for steam service and are standard on all new 1811 Safety Valves The...

Страница 19: ...4 780 005 121 41 0 13 149 002 3 78 0 05 XII Inspection and Part Replacement Cont 3 Clearance between the disc and upper ring guide Measure the inside diameter of the guide and the outside diameter of...

Страница 20: ...028 002 003 0 71 0 05 0 08 206 002 003 5 23 0 05 0 08 3 958 100 53 P 3 364 85 45 3 718 002 002 94 44 0 05 0 05 039 002 003 0 99 0 05 0 08 245 002 003 6 22 0 05 0 08 4 458 113 23 Q 4 424 112 37 4 818...

Страница 21: ...the compression screw into the yoke reestablish the original relationship between compression screw and spindle as measured in disassembly Step 6 Then tighten the compression screw lock nut 7 Raise th...

Страница 22: ...until it moves freely Reduce the compression in the spring by turning the adjusting screw counter clockwise one turn as viewed from the top of the valve Replace the cap and lifting lever and retest th...

Страница 23: ...djusting ring is interfering with the blowdown of the valve To correct a hang up gag the valve remove the lower ring pin and lower the adjusting ring one notch as viewed through the ring pin hole move...

Страница 24: ...sides of the yoke as shown in Figure 14 Do not apply the gag load until the boiler hydrostatic pressure is equal to 80 of the pressure to which the low set valve is adjusted 3 Apply the gag load by t...

Страница 25: ...g area between valves of the same size and type will also affect accuracy With well calibrated gauges and valve seats in good condition accuracy on the order of 1 of set pressure may be expected Upon...

Страница 26: ...indle compression screw spindle straightness etc C Operating too close to set pressure C Lower operating pressure and or retrofit to Thermodisc design D Discharge stack binding on valve outlet D Corre...

Страница 27: ...1672805 M 1672810 G 1672805 N 1672811 H 1672806 P 1672811 J 1672807 Q 1672812 K 1672808 L 1672809 Lubricants Brand Application Points Size Container Part No Nickel Ease All threaded connections 2 oz...

Страница 28: ...n the top edge of the outlet flange Be sure to include the one or two letters preceding the figures in the serial number A typical valve nameplate is shown in Figure 15 CONSOLIDATED CERTIFIED BY TYPE...

Страница 29: ...n Upper 1 3 1 1 II 4 Adj Ring Lower 1 5 1 3 85 6 Adj Ring Upper 1811B 1 5 1 3 Adj Ring Upper 1811D 1 5 1 3 11 Spindle 1 5 1 3 III 2 Seat Bushing 1 5 1 3 95 12 Bottom Spring Washer 1 Set 5 1 Set 3 13 S...

Страница 30: ...ushing replacements code welding pilot replacement etc For further information please contact your Green Tag Center C Maintenance Training Rising costs of maintenance and repair in the Utility and Pro...

Страница 32: ...ormation The Baker Hughes logo Consolidated Green Tag EVT and Thermodisc are trademarks of Baker Hughes Company Other company names and product names used in this document are the registered trademark...

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