Pulsafeeder J25679 Chem-Tech Series 253 Buna Diaphragm - 0.050 Inch Thick

The Pulsafeeder J25679 is a Buna replacement diaphragm for compatible Chem-Tech Series 253 chemical metering pumps. Pulsafeeder replacement parts listings identify this component as DIAPHRAGM(BUNA), .050-THK S253.

This replacement diaphragm has a manufacturer-listed nominal thickness of 0.050 inches. It is intended for the applicable Series 253 diaphragm assembly and should be selected according to the original pump configuration.

Product Specifications

• Manufacturer: Pulsafeeder
• Part Number: J25679
• Product Name: Chem-Tech Series 253 Buna Diaphragm
• Catalog Description: DIAPHRAGM(BUNA), .050-THK S253
• Product Type: Replacement Pump Diaphragm
• Material: Buna Rubber
• Nominal Thickness: 0.050 Inches
• Nominal Thickness in Millimeters: 1.27 mm
• Documented Pump Series: Chem-Tech Series 253
• Product Family: Chem-Tech
• Component Category: Diaphragm Replacement Parts
• Diaphragm Diameter: Not Independently Verified
• Exact Rubber Compound: Not Independently Verified
• Pressure Rating: Depends on the Applicable Pump Assembly
• Exact Pump Model Compatibility: Verify Manufacturer Parts Diagram

Chem-Tech Series 253 Replacement Diaphragm

The J25679 diaphragm is listed specifically for the Chem-Tech Series 253 pump configuration.

Diaphragms are essential components in diaphragm-type metering pumps. Their controlled movement helps create the displacement needed for the pump to move fluid through its check valve system.

Correct diaphragm selection is important for maintaining the intended pump assembly configuration and operating performance.

Buna Rubber Construction

The manufacturer identifies the diaphragm material as Buna.

Buna is commonly associated with nitrile rubber, a synthetic elastomer used in many industrial sealing and flexible component applications.

Chemical compatibility depends on the actual rubber formulation, the pumped fluid, temperature and operating conditions. Do not assume that Buna is compatible with every chemical used in metering pump applications.

0.050-Inch Nominal Thickness

The Pulsafeeder J25679 has a catalog-listed nominal thickness of 0.050 inches, equivalent to approximately 1.27 millimeters.

Diaphragm thickness is an important original equipment specification. Replacement components should match the manufacturer requirements for the applicable pump assembly.

The available parts listings do not independently establish the diaphragm diameter or detailed geometric dimensions.

Series 253 Pump Compatibility

Replacement parts catalogs identify J25679 for the Chem-Tech Series 253.

Other Chem-Tech pump models may use different diaphragms. For example, part number J25680 is listed separately for the Series 254 configuration.

Confirm the original part number and pump model before ordering.

Potential Applications

• Chem-Tech Series 253 pump maintenance
• Replacement of worn or damaged pump diaphragms
• Chemical metering pump servicing
• Industrial chemical dosing equipment repair
• Water treatment chemical feed pump maintenance
• Original equipment diaphragm replacement
• Preventive maintenance of compatible pump assemblies

Inspection and Maintenance

Inspect the existing diaphragm for cracks, tears, deformation, loss of flexibility and signs of chemical deterioration.

Check the surrounding diaphragm support and pump head components for wear or damage.

Diaphragm failure may be associated with operating conditions, chemical incompatibility or mechanical problems that should be investigated before installing a replacement.

Installation Guidelines

Before installing Pulsafeeder J25679, confirm that the pump is a compatible Chem-Tech Series 253 configuration.

Disconnect electrical power, isolate the chemical feed system and release pressure before opening the pump head.

Install the replacement diaphragm according to the manufacturer service procedure, including any specified alignment and tightening requirements.

After reassembly, check for leakage and verify correct pump operation.

Ordering Information

Order using the exact manufacturer part number J25679.

Confirm the Buna material, 0.050-inch nominal thickness and Series 253 application before purchasing.