ARO 94102 Santoprene Check Valve Diaphragm | AODD Air Section Part

ARO 94102 Santoprene Check Valve Diaphragm

The ARO 94102 is a Santoprene check-valve diaphragm used in the air motor section of compatible ARO air-operated double-diaphragm pumps.

ARO service documentation identifies the component as Item 176 - Diaphragm (check valve) and specifies the material as Santoprene.

Air Motor Component, Not Main Fluid Diaphragm

The 94102 is an important air-section component and should not be confused with the pump's primary fluid diaphragms.

It operates within the pneumatic valve system that controls directional air flow and pump cycling.

Santoprene Material

Official ARO parts tables use material code [SP] for the 94102, where SP denotes Santoprene.

The flexible diaphragm is designed for repeated movement as part of the air-valve check system.

Item 176 Reference

The 94102 is consistently listed as Item 176 in applicable ARO air-motor parts diagrams.

This reference helps technicians locate and verify the correct component during air-section maintenance.

Two Required in Applicable Assemblies

ARO manuals for compatible PD10, PD20, PD30 and PM20 pump families list two 94102 diaphragms in the applicable air-motor assembly.

This is an installed assembly quantity and should not automatically be interpreted as the supplier package quantity.

Compatible Pump Families

Published ARO documentation shows the 94102 in multiple pump platforms, including:

• PD10 Series
• PD20 Series
• PD30 Series
• PM20 sanitary transfer pumps
• Selected related EXP and sanitary pump configurations

Compatibility should always be confirmed using the complete ARO model and applicable parts manual.

Air Section Service Kit Component

The 94102 is included in applicable Air Section Service Kits. Depending on the pump model, it may also be included in a Major Valve Service Assembly.

For example, published PD20 service information includes 94102 in the air-section kit and major-valve service assembly.

Maintenance Inspection

Inspect the check-valve diaphragms during scheduled air-section service or when troubleshooting irregular pump cycling or air-valve performance.

Related components such as O-rings, track gaskets, valve plate, valve insert and pilot-valve components should also be inspected during maintenance.

Ordering Guidance

Before purchasing, verify:

• ARO part number 94102
• Complete pump model
• Item 176 position
• Santoprene material requirement
• Required quantity
• Whether a complete air-section or major-valve kit is more appropriate

Using the exact manufacturer part number helps ensure the correct air-valve check diaphragm is selected for the repair.