Emerson Sempell S Series Operating Instructions Manual Download Page 16 | Manualshive

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SEMPELL

SERIES S, TYPES SO, SC, SB, SOH FULL-LIFT SAFETY VALVES

OPERATING INSTRUCTIONS

DISC HOLDER AND SPINDLE DESIGN

BALANCED PISTON 144, TYPE SO

BELLOWS DESIGN P TO Z

SPRING COMPRESSION FOR ORIFICE T TO Z

D to T

T1 to Z

U to Z

M to T and above the

pressure rates 09 (160) K

and 03 (040) L

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Summary of Contents for Sempell S Series

Page 1: ...ions Nevertheless improper use or improper installation can cause risks for the personnel or can lead to restrictions in regard of the operational safety Therefore the Sempell GmbH recommends the operator of the safety valves to take appropriate measures and make sure that the present operating instructions are read and understood by the assigned personnel APPLICATION LIMITS It is only allowed to ...

Page 2: ...perating under increased temperature Disassembly of the safety valve only in case of pressureless plant or after cooling down Protection against risks caused by evaporation also in case of pressureless system for information please contact the safety inspector concerned After assembly check all sealing points in regard of tightness In case of adjustment make changes at pressure screw and adjusting...

Page 3: ...f elastic material O rings scraper rings rod and piston gaskets additionally apply Temperature The temperature of the storage shall be between 0 C and 25 C since otherwise a hardening of the material and so a shortening of durability will follow Shield heating elements and lines in heated storeroom so that no direct heat irradiation arises The distance between the heat source and the stocks has to...

Page 4: ...sible ATTENTION A pressure loss higher than the closing pressure difference may lead to an unstable uncontrollable behaviour of the safety valve chattering or vibrating may destroy the valve seat the safety valve or the line and thus lead to the failure of the safety function or to the shutdown of the plant In order to facilitate the drainage of condensate the inlet line must be mounted to the val...

Page 5: ...function or to shutdown of the plant ATTENTION An icy frozen or clogged exhaust line leads to the failure of the safety function Danger of explosion in case of excess pressure ATTENTION In case of a blocked safety valve the test pressure can amount up to 1 5 of the set pressure without consultation with Sempell CAUTION In case of several safety valves with one common exhaust line take special safe...

Page 6: ... The function and reliability of the safety valves type S have been proved by a type test conducted by the US National Board of Boiler and Pressure Vessels Inspectors as well as by a component test according to VdTÜV 966 Therefore an operational test in the plant need not be conducted and is restricted to exceptions normally at the time of revision of steam boiler safety valves Before discharge te...

Page 7: ...g pressure difference 1 Increase closing pressure difference Otherwise reduce flow resistance of the supply line expand shorten or remove area reductions Fast remedy reduce lift as far as allowed thus reduce discharge 2 Discharge quantity is too small because the subsequent flow is too small 2 Install smaller safety valve 3 Admissible back pressure is exceeded in the exhaust line 3 Decrease flow r...

Page 8: ... tour Check valve in regard of tightness Therefore observe the following indications Whistling noises medium emerging at the bonnet 12 medium at the drain nozzle or in the exhaust line During each inspection Check all gaskets Replace them if leaky Control seat faces Recondition valve seat 2 1 and disc 3 with fine lapping paste if necessary replace disc 3 section 7 Smooth disc holder 7 in the guide...

Page 9: ... preserve the valve set pressure ATTENTION Loosen bonnet nuts 14 only if the spring 15 is locked or released as otherwise the bonnet studs 13 cannot absorb the compression way of the spring 15 For working at nuts 18 22 or adjusting screw 17 secure the spindle 11 or 7 2 at orifice T1 Z SOH against rotating as otherwise the valve seat 2 1 or the bellows 8 can be damaged ATTENTION The dismounted valv...

Page 10: ...70 84 98 114 5 6 Dismantling of the safety valve Removal or disassembly of the possibly mounted pneumatic drive A 160 see operating instruction SEMSH 0067 Remove lead seal Take off cap 19 20 21 Remove dowel 40 and spindle nut 22 Measure distance from upper edge spindle 11 or 7 2 at orifice T1 Z SOH to upper edge adjusting screw 17 and register it Loosen adjusting screw nut 18 and release the sprin...

Page 11: ... 2 at orifice T1 Z SOH Place bonnet 12 into position In doing so insert spindle 11 or 7 2 at orifice T1 Z SOH into the adjusting screw 17 Fix bonnet 12 by means of bonnet studs 13 and bonnet nuts 14 by the tightening torques MA according to table Prestress spring 15 with adjusting screw 17 to the dimension measured before disassembly Therefore secure spindle 11 or 7 2 at orifice T1 Z SOH at dual c...

Page 12: ...ifferent grain sizes are pasted onto a plain carrier wheel of the machine The prepared seating areas with 3 2 Ra roughness are alternately lapped with grain sizes of 200 600 1000 After lapping with 200 grain size there should be no visible tool marks The change takes place at intervals of about 1 minute Lapping is carried out with oscillating movements Finally the seating area is cleaned and visua...

Page 13: ...stud 14 Bonnet nut 15 Spring 16 Washer 17 Adjusting screw 18 Adjusting screw nut 19 Cap 20 Cap top 21 Cap bolt 21 1 Hexagonal screw 22 Spindle nut 23 25 Gaskets 26 Gasket 27 Drain plug 29 Dowel 30 Pin 31 Retainer 32 Lower bearing plate 33 Bearing 34 Upper bearing plate 35 Signal pin 36 Intermediate flange guide 36 1 Pipe 36 2 Hexagonal screw bolt 36 3 Hexagonal nut 36 4 Locking plate 37 Retaining ...

Page 14: ...7 1 11 16 12 10 24 30 13 16 19 35 22 40 20 49 50 15 32 33 17 18 8 14 7 4 34 1 27 2 1 21 31 3 SEMPELL SERIES S TYPES SO SC SB SOH FULL LIFT SAFETY VALVES OPERATING INSTRUCTIONS TYPE SO Safety valve with open bonnet for steam and inert gases TYPE SB Safety valve with balancing bellows and vented bonnet for vapours gases and liquids ...

Page 15: ...LVES OPERATING INSTRUCTIONS BODY AND ADJUSTING RING DESIGNS FLANGE CONNECTION ACCORDING TO DIN FLANGE CONNECTION ACCORDING TO ANSI Without adjusting ring Type SC Type SO Type SB With adjusting ring Type SCR Type SOR Type SBR Without adjusting ring Type SCL Type SOL Type SBL With adjusting ring Type SC Type SO Type SB ...

Page 16: ... SERIES S TYPES SO SC SB SOH FULL LIFT SAFETY VALVES OPERATING INSTRUCTIONS DISC HOLDER AND SPINDLE DESIGN BALANCED PISTON 144 TYPE SO BELLOWS DESIGN P TO Z SPRING COMPRESSION FOR ORIFICE T TO Z D to T T1 to Z U to Z M to T and above the pressure rates 09 160 K and 03 040 L ...

Page 17: ... SERIES S TYPES SO SC SB SOH FULL LIFT SAFETY VALVES OPERATING INSTRUCTIONS CAP DESIGN DESIGN TYPE SOH Detail X screw locking by deformation K to T and above the pressure rates 08 160 H and 06 063 J D to G and below the pressure rates 08 160 H and 06 063 J U to Z J to T T1 to Z 2017 Emerson All rights reserved ...

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