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IOM-3200

Gasket seating surfaces for tank nozzle flange must be clean, free of scratches, 
corrosion, tool marks and flat. Use either a full faced or ring gasket for steel and 
stainless steel raised face flanges
FRP and Aluminum vents are furnished with flat faced flanges. It is recommended 
that they be installed on mating flat face flanges with a full faced gasket.  If the flat 
face of the vent is sealing against a raised face steel flange, a spacer or filler ring 
must be used to fill the annular space of the raised face steel flange.
Refer to Gasket Dimension Table.
Ensure that the gasket material is suitable for the service. 

 

Make sure that the 

gasket is compressed evenly and the flanges are not distorted. Utilizing proper 
torquing techniques will ensure a tight seal and prevent leakage around the 
gasket. See preceding page.

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 Gasket

Summary of Contents for 3200

Page 1: ...r overpressure 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 clo...

Page 2: ...the venting device II SAFETY WARNINGS Tank or system protection is the primary function of the weight loaded Pressure and or Vacuum Relief Vent It must be selected to meet the total pressure and vacu...

Page 3: ...laxed 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 equ...

Page 4: ...ut 14 For settings above 32oz in2 See Figure 5 Remove machine screws 43 CCW Lift up to remove diaphragm retainer 17 24 and diaphragm 18 25 and pallet 19 26 and stiffener plate 20 27 Clean parts with a...

Page 5: ...ccur if any of these three conditions happens This can cause a tank failure severe personal injury and material damage Select the appropriately tagged set of weights 21 28 and carefully lower each set...

Page 6: ...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 pur...

Page 7: ...hipped 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...

Page 8: ...ap Screw 16 Seat Rings 17 Diaphragm Retainer Vac 18 Pallet Diaphragm Vac 19 Pallet Vac 20 Stiffener Plate Vac 21 Pallet Weights Vac 22 Pallet Guide Vac 23 Stem Assy Vac ITEM NO DESCRIPTION 24 Diaphrag...

Page 9: ...EM NO DESCRIPTION 14 Lock Nuts 17 Diaphragm Retainer Vac 18 Pallet Diaphragm Vac 19 Pallet Vac 22 Pallet Guide Vac 23 Stem Assy Vac ITEM NO DESCRIPTION 24 Diaphragm Retainer Pres 25 Pallet Diaphragm P...

Page 10: ...GTH 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 46 41 39 10 56 47 47 12 58 51 55 Quantity 2 per unit Quantity 3 per unit Figure 10 Flame Screen ITEM NO DESCRIPTION...

Page 11: ...assume responsibility for the selection use or maintenance of any product Responsibility for proper selection use and maintenance of any Cashco Inc product remains solely with the purchaser Figure 11...

Page 12: ...t 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 7...

Page 13: ...sed face steel flange Refer to Gasket Dimension Table Ensure that the gasket material is suitable for the service Make sure that the gasket is compressed evenly and the flanges are not distorted Utili...

Page 14: ...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 m...

Page 15: ...CA5 SA5 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...

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