Aqualon 11621 – Check Valve Static Backup Ring – Replaces OMAX 300735*
Aqualon 11621 – Check Valve Static Backup Ring – Replaces OMAX 300735* - Image 2

Aqualon 11621 – Check Valve Static Backup Ring – Replaces OMAX 300735*

Aqualon part 11621 is a static backup ring for check valve assemblies, equivalent to OEM 300735. Designed to support soft seals under pressure and prevent extrusion. Typically installed behind O-rings in static high-pressure joints.
Bullet Points:

  • Aqualon part number: 11621

  • OEM reference: 300735

  • Static backup ring

  • Prevents extrusion of soft seals

  • For use in OMAX and EnduroMAX check valves

Availability: In stock

SKU: 11621 Category: Brand:

Aqualon 11621 – Check Valve Static Backup Ring – Replaces OMAX 300735

Aqualon Part Number: 11621
Replaces OMAX Part Number(s): 300735
Other References: None verified
Stock Status: In stock (Europe) – Estimated 2 week lead time. Ships from Melbourne, Australia.

Overview

The Aqualon 11621 – Check Valve Static Backup Ring – Replaces OMAX 300735 is a non-moving support ring used inside the inlet and outlet check valve assemblies on legacy OMAX and MAXIEM direct-drive pumps. It reinforces the static seal and prevents extrusion under high-pressure operation.

Purpose / Why It Matters

In a high-pressure reciprocating pump, the static backup ring protects the adjacent seal from deforming into clearances within the check valve body. A worn or damaged backup ring can lead to reduced sealing compression, internal leakage, or check-valve instability. Replacing it restores proper support for the sealing stack and contributes to consistent pressure output.

Compatibility

This part replaces OMAX 300735 and is compatible only with legacy OMAX direct-drive pumps and MAXIEM direct-drive pumps that specify this OEM number.
No EnduroMAX compatibility is implied.

When to Replace / Service Indicators

Replace the static backup ring when:
• The check valve exhibits leakage or fails to hold pressure
• The ring shows flattening, distortion, or material damage
• Adjacent seals extrude or wear prematurely
• The check valve is being rebuilt as part of scheduled maintenance

Common Uses

• Supporting static sealing components within inlet and outlet check valves
• Restoring correct valve geometry during rebuilds
• Improving pressure stability in production environments
• Completing minor or major pump wet-end service

Why Choose Aqualon

The Aqualon 11621 provides a verified dimensional and functional match to OMAX 300735, ensuring proper support of the static seal and reliable long-term performance in legacy OMAX and MAXIEM direct-drive pump check valve assemblies.

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