ARO 94328-A Santoprene Valve Seat | 2 in. Metallic AODD Pump

ARO 94328-A Santoprene Valve Seat

The ARO 94328-A is a Santoprene replacement valve seat used in compatible 2-inch metallic ARO air-operated double-diaphragm pumps.

The seat forms part of the fluid-section check-valve assembly and provides the sealing surface used by the check ball during pump operation.

Santoprene Material

The 94328-A is made from Santoprene and is commonly described as a cream-colored valve seat in ARO parts listings.

Confirm material compatibility with the actual process liquid, concentration and operating temperature before installation.

For 2 Inch Metallic Pump Configurations

Published parts references identify the 94328-A for compatible 2-inch metallic ARO pumps, including selected PD20X-X Expert-Series and 66625 Series configurations.

ARO also offers alternate seat materials for related pump families, so the complete pump model and material code should be checked before ordering.

Item 21 in the Fluid Section

The 94328-A is listed as Item 21 in applicable ARO fluid-section parts documentation.

This item reference can help technicians match the replacement seat to the correct position in the pump exploded diagram.

Four Seats per Applicable Assembly

Applicable pump parts listings show four 94328-A valve seats in the documented assembly.

This is an assembly quantity and does not necessarily represent the number supplied in a single sales package.

Check-Valve Performance

The valve seat works together with the check ball to regulate directional fluid movement through the pump.

A worn, damaged or contaminated seat can interfere with proper sealing and may contribute to reduced efficiency, loss of prime or inconsistent flow.

Published Compatible Model Examples

• PD20A-AAP-AAA-B
• PD20A-ACP-AAA-B
• PD20A-ASP-AAA-G
• PD20A-ASS-AAA-B
• 666251-EEB-C

Compatibility is not limited to these examples. Always verify the complete ARO model before purchase.

Fluid-Section Service Planning

During maintenance, inspect all four valve-seat positions along with the corresponding check balls, O-rings and related sealing components.

If several fluid-section parts require replacement, compare individual components with the appropriate ARO fluid-section service kit for the specific pump configuration.

Ordering Guidance

Before purchasing, confirm:

• ARO part number 94328-A
• Complete pump model
• Santoprene material requirement
• 2-inch metallic pump configuration
• Item 21 position
• Required replacement quantity

Using the exact ARO part number helps ensure the correct seat material and pump configuration are selected for the repair.