Emerson CROSBY Installation, Maintenance And Adjustment Instructions Download Page 3

Page: 3 / 11

26,

CROSBY

STYLE HSL SAFETY VALVES

INSTALLATION, MAINTENANCE AND ADJUSTMENT INSTRUCTIONS

BILL OF MATERIALS (K thru Q Orifice)

Item

Part name

Material

Body

ASME SA216 Grade WCB/WCC Carbon steel (HSL-( )6)
ASME SA217 Grade WC6 Chrome Moly steel (HSL-( )8)

Nozzle

ASME SA479 Type 316 Stainless steel

Drain plug

Carbon steel

Nozzle ring

ASME SA351 Grade CF8M Stainless steel

Nozzle ring set screw

Type 416 Stainless steel

Disc insert*

Type 422 Stainless steel

7A and B Disc holder and bushing Monel

/440C Stainless steel

Disc insert cotter pin*

Stainless steel

Guide

Monel

Guide ring

ASME SA351 Grade CF8M Stainless steel

Guide ring set screw

Type 416 Stainless steel

Bonnet stud nut

ASME SA194 - Class 2H

Bonnet stud

ASME SA193 Grade B7

Spring washers

Carbon steel

Bonnet

ASME SA216 Grade WCB/WCC Carbon steel (HSL-( )6)
ASME SA217 Grade WC6 Chrome Moly steel (HSL-( )8)

Spindle

Type 416 Stainless steel

Adjusting bolt

Type 416 Stainless steel

Adjusting bolt nut

Steel

Cap

Malleable iron

Cap set screw

Stainless steel

Lever

Malleable iron

Forked lever

Malleable iron

Spindle nut

Steel

Spindle nut cotter pin

Steel

Cotter pin

Steel

Forked lever pin

Steel

Spring

Alloy steel (corrosion resistant coating)

Lever pin

Steel

Cotter pin

Steel

Nameplate

Stainless steel (not shown)

K thru Q

Orifice construction

FIGURE 2

* Recommended spare part

Summary of Contents for CROSBY

Page 1: ... Spare parts may be ordered from any Emerson regional sales office or authorized Emerson sales representative VCIOM 03104 EN 22 03 Engineering doc nr IS V3187 Centering of the disc through the low friction guide ensures the HSL opens precisely at set pressure even after repeated cycling The single bonnet design utilized in both inlet flange ratings allows set pressure changes without the need to c...

Page 2: ...351 Grade CF8M 8 Guide ring Stainless steel 9 Guide ring set screw Type 416 Stainless steel 10 Bonnet stud nut ASME SA194 Class 2H 11 Bonnet stud ASME SA193 Grade B7 12 Spring washers Carbon steel 13 Bonnet ASME SA216 Grade WCB WCC Carbon steel HSL 6 ASME SA217 Grade WC6 Chrome Moly steel HSL 8 14 Spindle Type 416 Stainless steel 15 Adjusting bolt Type 416 Stainless steel 16 Adjusting bolt nut Ste...

Page 3: ...Stainless steel 10 Guide Monel 11 Guide ring ASME SA351 Grade CF8M Stainless steel 12 Guide ring set screw Type 416 Stainless steel 13 Bonnet stud nut ASME SA194 Class 2H 14 Bonnet stud ASME SA193 Grade B7 15 Spring washers Carbon steel 16 Bonnet ASME SA216 Grade WCB WCC Carbon steel HSL 6 ASME SA217 Grade WC6 Chrome Moly steel HSL 8 17 Spindle Type 416 Stainless steel 18 Adjusting bolt Type 416 S...

Page 4: ...es 4 RIGGING AND HANDLING Pressure relief valves must be handled carefully and never subjected to sharp impact loads While in the shipment case or when uncrated they should not be bumped or dropped 5 INSPECTION PRIOR TO INSTALLATION Safety valves should be inspected visually before they are installed to ensure that no damage has occurred during shipment or while in storage All protective material ...

Page 5: ... recommended that the testing be performed before installation of the pressure relief valves and that blank flanges are used during the test In the event the valve has been installed it is recommended it be removed and blank flanges installed for hydrostatic test purposes Blank flanges must be removed and the pressure relief valve installed before the vessel is placed in service In the event the p...

Page 6: ...Appropriate safety equipment including hearing protection should be worn at all times when servicing a steam pressure relief valve TABLE 1 TORQUE VALUES FOR VALVE ASSEMBLY Set pressure psi MPa Tolerance plus or minus from set pressure 70 0 5 2 psi 15 kPa 70 0 5 and 300 2 1 3 of set pressure 300 2 1 and 1 000 7 0 10 psi 70 kPa 1 000 7 0 1 of set pressure Seat tightness testing After the set pressur...

Page 7: ...or bearing on top of a tooth NOTE It is very important not to allow the valve to pop prior to reinstalling the nozzle ring set screw Marking the new ring settings If different ring settings are obtained after testing re stamp the valve bonnet with the new tested ring settings 11 VALVE MAINTENANCE The functioning and service life of a safety valve depends primarily upon methods used in its maintena...

Page 8: ...sing the TIR values found in Table 4 Use either V blocks or chuck the spindle into a lathe and dial indicate to check for straightness If necessary the spindle may be straightened by applying force to the spindle until within tolerances If it is not possible to straighten a bent spindle it should be replaced Lapping valve nozzles and disc inserts Good seating surfaces on the nozzle and disc insert...

Page 9: ...res of the block should be present This should provide a very smooth finish If scratches appear the cause is probably dirty lapping compound These scratches should be removed by using compound free of foreign material Discs and disc inserts should be lapped in the same way as nozzles The disc insert must be removed from the holder before to lapping Machining nozzle seats If machining of the nozzle...

Page 10: ...nt unnecessary strain and possible misalignment J Lift the disc insert slightly by lifting the spindle rod Lower the nozzle ring below the seats Release the spindle slowly to permit the disc insert to contact the nozzle seat gently Check that the nozzle ring moves freely K Screw the adjusting bolt and nut into the top of the bonnet the same number of turns originally required to remove the spring ...

Page 11: ...nes for use of their certification mark At minimum it is best practice for the repair nameplate to provide 1 The name of the repair company 2 The date of the repair 3 The set point at which the valve was tested 4 A unique number to enable traceability of the repair NOTE The original nameplate affixed to the valve when first built should never be removed from the valve The repair nameplate or any o...

Search results

Summary of Contents for CROSBY

Reviews:

Related manuals for CROSBY

Brands by name

Popular brands

Emerson CROSBY, Installation, Maintenance And Adjustment Instructions

Search results

Summary of Contents for CROSBY

Reviews:

Related manuals for CROSBY

Brands by name

Popular brands