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IOM-3600

Figure 4 - Standard Vent

Aluminum, Carbon Steel, Stainless Steel

ITEM NO.

DESCRIPTION

Flange

Lift Brackets

Cap Screws

Cap

Nipple

Cover

Name Plate

Cap Screws

Pipe Plug

Upper Body

Nut *

ITEM NO.

DESCRIPTION

Socket Cap Screw

Seat Ring

Diaphragm Retainer

Pallet Diaphragm ‡

Pallet

Stiffener Plate

Pallet Weights

Pallet Guide

Stem Assy

‡ Recommended Spare Part

* Early Models included a lock washer, plain washer and a cotter pin.

Detail A

Содержание 3000 SERIES

Страница 1: ...verpressure conditions As the tank pressure increases as a result of product being pumped into the tank and or because of thermal expansion of the product and vapors the pressure pallet remains closed until the set pressure of the vent is reached When the tank pressure reaches the pressure setting of the vent the pressure pallet lifts allowing the tank pressure to bleed off Figure 2 illustrates th...

Страница 2: ...ank or system protection is the primary function of the weight loaded Vacuum Relief Vent It must be selected to meet the total pressure and vacuum flow requirements within the Maximum Allowable Working Pressure and Vacuum of the system on which it is installed Consult API Standard 2000 for tank protection sizing procedures Improperly specified relief vents may result in structural damage to the ta...

Страница 3: ...ual increments Proceed through the tightening sequence until the recommended torque is attained Recheck the torque on each bolt in the same sequence as bolts previously tightened may have relaxed through the torque sequence WARNING Minimum clearance between tank roof and vacuum inlet port must be at least equal to the vents nominal flange bore Tank nozzle bore must be greater than or equal to vent...

Страница 4: ...ole on the pallet 26 Install new diaphragm 25 Re install diaphragm retainer 24 and washer secure nut 14 tight on stem Inspect and clean seat ring 16 NOTE FRP seat surfaces are integral inside the body Check seat surface for any nicks corrosion pitting or product build up Seat surface must be clean and smooth for vent to perform properly To Remove Seat Ring Make a match mark between the flange 1 an...

Страница 5: ... Exercise care so as not to damage the pallet diaphragm and seat surface NOTE When installing the cover 8 ensure the pressure stem assembly 30 is inserted in the cover guide Place a new piece of TFE tape rope seal 34 0 on the face of the body cover flange See Figure 8 Place cover 8 over stem of pallet assembly align bolt holes with the body 1 and install cap screws 10 Using a star crossing pattern...

Страница 6: ...e of leakage does not exceed SCFH for 6 inch size and smaller 5 SCFH for 8 inch to 16 inch or 20 SCFH for larger than 16 inch at 75 of set point then a vent is considered satisfactory for all practical purposes A test report should be completed for each vent The report should indicate the total pallet weight and the pressure achieved at the Test Flow Rate for both pressure and vacuum Other general...

Страница 7: ...ed Serial Number typically 6 digits PARTS KIT for FIELD REPAIR Contact your local Cashco Inc Sales Repre sentative with the Serial Number and Product code Identifythepartsandthequantityrequired to repair the unit from the BOM sheet that was provided when unit was originally shipped NOTE If the BOM is not available refer to the cross sectional drawings included in this manual for part identificatio...

Страница 8: ...8 Cover 9 Name Plate 10 Cap Screws 12 Pipe Plug 13 Upper Body 14 Nut ITEM NO DESCRIPTION 15 Socket Cap Screw 16 Seat Ring 24 Diaphragm Retainer 25 Pallet Diaphragm 26 Pallet 27 Stiffener Plate 28 Pallet Weights 29 Pallet Guide 30 Stem Assy Recommended Spare Part Early Models included a lock washer plain washer and a cotter pin Detail A Detail A ...

Страница 9: ...PE LENGTH Size Item 34 0 Item 34 1 Item 34 2 2 23 17 20 3 25 20 22 4 33 28 26 6 38 34 32 8 38 34 32 10 46 41 39 12 56 47 47 14 58 51 55 Quantity 2 per unit ITEM NO DESCRIPTION 29 Pallet Guide 35 Indicator Housing 36 Indicator 37 Cable Connector 38 Cable ATEX 39 Cap Screw 40 Flame Bug Screen 41 Flame Screen Ring 42 Cap Screws ...

Страница 10: ...et torque Check flange gap around circumference for uniformity If the gap is not reasonably uniform make the appropriate adjustments by selective tightening before proceeding Round 2 Tighten to 50 to 70 of target torque Check flange gap around circumference for uniformity If the gap is not reasonably uniform make the appropriate adjustments by selective tightening before proceeding Round 3 Tighten...

Страница 11: ...ge NOTE Incorrect positioning and or selection of gasket s between the flanges will cause bending stresses at the flange that may damage the flange joint as bolting is tightened This is more likely to occur with aluminum or cast iron materials RECOMMENDATIONS FOR PROPER GASKET INSTALLATION Correct Installation Correct Installation Incorrect Installation Full Faced Gasket Spacer and Full Faced Gask...

Страница 12: ...ct leads to heating or cooling of the process gas depends on the process gas and the inlet and outlet pressures The system designer is responsible for determining whether the process gas temperature may raise under any operating conditions 2 Where the process medium is a liquid or semi solid material with a surface resistance in excess of 1GΩ special precautions shall be taken to ensure the proces...

Страница 13: ...A5 DA2 DA4 DA5 DA6 DA8 DA0 DA1 DAP SAP SLR 1 SLR 2 PTR 1 ALR 1 ULR 1 PGR 1 BQ BQ OPT 45 BQ CRYO 123 123 CRYO 123 OPT 45 123 OPT 46G 123 1 6 123 1 6 OPT 45 123 1 6 OPT 46G 123 1 6 S 123 1 6 S OPT 40 1000HP 1000HP OPT 37 1000HP OPT 45 1000HP OPT 45G 1000HP CRYO 1000HP 1 6 1000HP 1 8 1000LP 1000LP OPT 45 1000LP OPT 46G 6987 8310HP 8310HP 1 6 8310HP 1 8 8310LP 8311HP 8311LP 345 345 OPT 45 BA1 BL1 PA1 ...

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