Find Your Chem-Fuse™ Diaphragm
Chem-Fuse™: Solving the Limitations of Conventional Diaphragms
Conventional diaphragm designs feature an outer piston, creating a “product-trap” zone that is susceptible to abrasion, wear and leakage. Reduced-stroke Integral Piston Diaphragms (IPDs) avoid that trap but usually limit flow and suction lift — in some cases by as much as 50%.
By removing the outer piston, Chem-Fuse™ diaphragms eliminate this critical failure mode. And because they use a full-stroke, integral piston design, they retain or improve performance, making them suitable for more demanding fluid services.
Wilden® Chem-Fuse™ Patented Integral Piston Diaphragms
Chem-Fuse™ IPDs represent a significant advance over conventional AODD pump diaphragms. The one-piece design eliminates the outer piston, reducing abrasion, leak potential and the need for maintenance.
7 Key Advantages Over Traditional AODD Pump Diaphragms:
- Delivers 2x to 15x longer life by eliminating outer-piston abrasion and product-trap areas
- Less downtime, more operational uptime
- Improves containment and safety when handling aggressive, hazardous or valuable fluids by eliminating leak paths
- Extended service life under demanding conditions
- Increased reliability in harsh or critical fluid service
- Easier cleanability for faster changeovers in multi-product environments
- Maintains or enhances performance (flow, suction lift) relative to reduced-stroke designs — up to 100% increased flow/suction lift in some cases vs. short-stroke IPDs
Chem-Fuse™ Diaphragms: Upgrade Without Compromise
In chemical transfer, you can’t accept weak links. Traditional diaphragms and many reduced-stroke IPDs introduce tradeoffs: either you sacrifice durability or performance. Chem-Fuse™ diaphragms sidestep that compromise. They combine full-stroke design with an integral piston, eliminating leak zones while preserving or enhancing flow and suction.
Features and Benefits That Drive Performance
Chem-Fuse™ diaphragms are engineered for robustness, compatibility and versatility. Key specs include:
- Materials: Wil-Flex®, Bunalast™, non-food-grade Saniflex™
- Temperature Range: From –40 °C up to 130 °C (varies by material)
- Sizes & Compatibility: 1″ (25 mm) to 4″ (102 mm) — compatible with Wilden’s® Pro-Flo® SHIFT, bolted metal, and plastic pump models
- High-pressure Option: Available for Wilden® H800 models
- Large Solids Passage Option: Available for the Wilden PS810 and PS1510 Brahma models
Chem-Fuse™ Benefits summary:
- Longer diaphragm life reduces maintenance costs
- No leak path improves safety for hazardous fluids
- Superior flow/suction lift (versus reduced-stroke alternatives)
- Broad chemical and temperature compatibility
- Drop-in replacements for many Wilden® pumps
Tailored for Critical Industries
Chem-Fuse™ diaphragms are ideal where pump integrity, chemical compatibility and reliability are non-negotiable:
- Agriculture and food: Cleanability and purity are paramount
- Chemical Processing / Specialty Chemicals: Handling aggressive or hazardous fluids
- Paints, Coatings, Inks: Consistent transfer of solvents, pigments, resins
- Mining / Metals / Slurry: Withstand abrasion, high wear environments
- Water & Wastewater / Environmental: Durable in corrosive or cyclical duty
Why Chem-Fuse™?
Chem-Fuse™ is more than a diaphragm — it’s a performance leap. Unlike conventional diaphragms or suboptimal IPDs, it doesn’t force tradeoffs. Its one-piece integral design eliminates product trap zones while preserving full-stroke performance. That translates into higher uptime, safer operation, and lower lifecycle cost.
Chem-Fuse™ is part of Wilden’s® tradition of innovation in AODD pump technology. You can use the Chem-Fuse™ savings calculator to discover the potential impact of Chem-Fuse™ products on your business.
Frequently Asked Questions about Chem-Fuse™
You can purchase genuine parts from Wilden® and All-Flo™ straight from the source on the PSG® Store.
It uses a one-piece integral piston design with no outer piston, eliminating abrasion zones and leak paths common in conventional membranes.
No. Because it retains a full stroke and an integral piston, it maintains or improves flow/suction lift compared to reduced-stroke IPDs (up to a 100% increase in some cases).
2–3x in many applications; up to 15x under harsh conditions.
Yes, in most Wilden® Pro-Flo® SHIFT, bolted metal, and plastic models. Check model compatibility and material selection.
Different materials (Wil-Flex®, Bunalast™, Saniflex™) handle different ranges and chemistries.
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