Roper Pump D11-338 Case Gasket for 3611 to 4722 and Z Series
The Roper D11-338 is the case gasket for 3600 Series heavy duty gear pumps in the 11, 17 and 22 sizes, covering the 3611 through 4722 model range, and it is also listed for the Z Series Z11 pump, which shares a great deal of its parts with the 3600 design. On these pumps the case is sandwiched between a faceplate and a backplate, with a gasket at each joint, and those gaskets are what hold the gears at the correct running distance from the plates while sealing the pumped liquid inside.
Roper supplies this joint with a fiber gasket as standard, good for service up to about 212 degrees Fahrenheit, with aluminum and Teflon versions available where the product runs hotter, up to around 450 degrees. That temperature line is worth knowing, because the most common reason a rebuilt 3600 weeps at the parting line within weeks is a standard fiber gasket put into hot oil or asphalt service. Renew both case gaskets together, deburr the plate faces, and remember that the model number itself tells you the size: the last two digits are gallons per one hundred revolutions.
Key Features
- Genuine Roper Pump Company case gasket, part number D11-338
- Covers the 3611 through 4722 range in the 11, 17 and 22 displacement sizes
- Also listed for the Z Series Z11 gear pump
- Holds the gear to plate running clearance while sealing the parting line
- Standard fiber construction rated for service to roughly 212 degrees Fahrenheit
Applications
- 3600 Series heavy duty gear pumps in sizes 11, 17 and 22
- Z Series Z11 cast iron helical gear pumps
- Mixing, blending, recirculating and transfer duty
- Fuel oil, gasoline, solvent and petrochemical service
- Mobile and fixed transfer packages on tankers, barges and in process plants
Specifications
- Brand: Roper Pump Company
- Part Number: D11-338
- Part Type: Case gasket
- Fits: 3600 Series 3611 through 4722 and Z Series Z11
- Material: Fiber, with aluminum and Teflon options offered for high temperature service
- Function: Parting line seal and gear to plate clearance control
- Condition: New
Frequently Asked Questions
Q: How do I read my 3600 model number?
The first digit gives the port arrangement, right angle or straight through. The second gives the shaft sealing method. The last two digits are the displacement in gallons per one hundred revolutions, so a 3622 moves twice what a 3611 does per turn.
Q: My pump runs hot product. Does that change the gasket I need?
It can. The standard fiber gasket suits general purpose duty, while hot oil, asphalt and similar services are the reason Roper offers aluminum and Teflon versions of the same joint. Match the gasket to the temperature the pump actually sees.
Q: How many gaskets does one pump take?
A 3600 Series pump has a joint at each end of the case, so plan on renewing them as a pair. Your parts list confirms the count for your exact configuration.
Q: Can a leaking case joint be cured by tightening the bolts?
Only briefly. Once a gasket has taken a set, extra torque crushes it further and distorts the plate. Strip the joint, clean the faces and fit new gaskets instead.
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct case gasket before you order.
CLRMarine
