ARO 94104-A Santoprene Valve Seat | 3 in. Metallic AODD Pump

ARO 94104-A Santoprene Valve Seat

The ARO 94104-A is a Santoprene replacement valve seat used in compatible 3-inch metallic ARO air-operated double-diaphragm pumps.

The seat is part of the fluid-section check-valve system and provides the sealing surface against which the check ball closes during pump cycling.

Santoprene Material

The 94104-A is manufactured from Santoprene. This elastomer provides flexible sealing characteristics for compatible diaphragm-pump fluid applications.

Always verify chemical and temperature compatibility before installing the replacement seat.

For 3 Inch Metallic Pump Configurations

Published cross-reference information identifies the 94104-A as a Santoprene seat for 3-inch metallic ARO pumps.

Grainger also identifies the part for compatible ARO Expert-Series diaphragm pumps.

Published Compatible Models

• 66630A-EEB-C
• PD30A-AAP-AAA-C
• PD30A-ACP-AAA-C
• PD30A-ASS-AAA-C

These are documented examples only. Compatibility should be verified against the full manufacturer model before purchase.

Check-Ball Sealing Surface

The valve seat works with the pump check ball to maintain directional fluid movement. Proper sealing is important for suction performance, discharge flow and stable pump operation.

Wear, grooves, debris or chemical deterioration can interfere with the sealing surface and reduce pump efficiency.

Material Variation

ARO uses multiple seat materials across related pump families. For 3-inch metallic pumps, the 94104-A is associated with Santoprene, while 94104-G is associated with Geolast.

Do not select a replacement seat by appearance alone; verify the exact material code and pump configuration.

Inspection During Service

During fluid-section maintenance, inspect:

• Valve seats
• Check balls
• O-rings and seals
• Fluid caps
• Manifold sealing surfaces

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

Ordering Guidance

Before purchasing, verify:

• ARO part number 94104-A
• Complete pump model
• 3-inch metallic configuration
• Santoprene seat requirement
• Required replacement quantity

Using the complete manufacturer part number helps ensure the correct valve seat is selected for the pump fluid section.