A worn diaphragm brings your dust collector down. The ASCO C113685 diaphragm repair kit is the direct replacement for 2″ and 2-1/2″ ASCO pulse valves. But should you buy genuine OEM or an alternative? This guide compares both options side by side.
You will learn the key differences in quality, price, and performance. More importantly, you will get practical buying advice to help you choose the right kit for your budget and application. We have both genuine ASCO C113685 kits and high-quality alternatives in stock – ready to ship.
What Is the ASCO C113685 Repair Kit?
The ASCO C113685 is a diaphragm repair kit for larger pulse jet valves in the ASCO 353 series. It contains all the wear parts needed to rebuild a valve.
Compatible valve models include:
| Valve Model | Port Size |
|---|---|
| SCG353A050 | 2″ (DN50) |
| SCG353A051 | 2-1/2″ (DN65) |
| SCG353A047 | 1-1/2″ |
Some aftermarket suppliers also list this kit for SCG353A061 valves. Always check your valve nameplate before ordering.
What’s Inside the Kit
A complete C113685 repair kit includes:
- Main diaphragm (rubber membrane)
- Pilot seal disc (small sealing component)
- Stainless steel spring
- Gaskets and o-rings (varies by supplier)
Genuine ASCO C113685: The OEM Advantage
Genuine ASCO diaphragms are manufactured to Emerson’s exact specifications. Here is what you get with OEM.
Guaranteed Fit and Dimensions
ASCO original kits match the valve perfectly. The outer diameter (145mm), center distance (145.5mm), and mounting holes (8.5mm) are precisely engineered .
Consistent Material Quality
Genuine kits use ASCO-specified NBR (nitrile) rubber for standard applications. The compound resists oil, moisture, and temperature cycling better than many generic alternatives.
Full Warranty and Traceability
OEM parts come with manufacturer warranty and batch traceability. For regulated industries or critical applications, this matters.
The Trade-Off: Higher Price
Genuine ASCO C113685 kits cost significantly more – often 2-3 times the price of alternatives. For large maintenance budgets or infrequent replacements, the premium may be worth it.
Alternative C113685 Kits: The Cost-Effective Choice
High-quality alternative diaphragms offer a practical option for many operations. Here is what to expect.
Significant Cost Savings
Alternative C113685 kits typically cost 30-60% less than genuine ASCO. For plants with dozens or hundreds of valves, the savings add up quickly.
Comparable Material Quality
Reputable alternative suppliers use NBR, FKM (Viton), or EPDM rubber – the same base materials as OEM. The key is finding a supplier that specifies material type and provides certifications.
Variable Quality Between Suppliers
Not all alternatives are equal. Low-cost, no-name kits may use inferior rubber compounds that harden or crack prematurely. Always buy from a trusted pneumatic components supplier.
No OEM Warranty
Alternative kits do not carry ASCO/Emerson warranty. However, reputable suppliers offer their own guarantee – typically 12 to 18 months.
Genuine vs. Alternative: Head-to-Head Comparison
| Feature | Genuine ASCO C113685 | High-Quality Alternative |
|---|---|---|
| Price | High ($$$) | Low to medium ($-$$) |
| Fit | Exact OEM dimensions | Precision-engineered to match |
| Material | ASCO-specified NBR | NBR, FKM, or EPDM options |
| Warranty | Full manufacturer warranty | Supplier warranty (12-18 months) |
| Traceability | Full batch traceability | Varies by supplier |
| Availability | Sometimes backordered | Usually in stock |
| Best for | Critical, regulated, or high-liability applications | Routine maintenance, budget-conscious operations |
Which Should You Buy? Decision Guide
Your choice depends on several factors. Use this guide to decide.
Choose Genuine ASCO C113685 when:
- The valve is in a critical, single-point-of-failure location
- Your plant requires OEM parts for compliance or warranty
- You have a generous maintenance budget
- Downtime costs exceed the price difference
- The application involves extreme temperatures or aggressive chemicals
Choose a High-Quality Alternative C113685 when:
- You maintain many valves and need to control costs
- The application is routine dust collection with standard conditions
- Genuine kits are on backorder and you need parts immediately
- Your maintenance philosophy prioritizes frequent replacement over extended life
- The alternative supplier provides material specifications and warranty
Material Selection by Application
| Operating Condition | Recommended Material |
|---|---|
| Standard compressed air, 0-70°C | NBR (both OEM and alternative available) |
| High temperature, >70°C up to 180°C | FKM/Viton (alternative only – OEM is NBR standard) |
| Outdoor, steam, or water exposure | EPDM (alternative only) |
Where to Buy C113685 Kits
We stock both genuine ASCO C113685 kits and high-quality alternatives at BM Pneumatics .
Why Buy from BM Pneumatics?
- Dual options: Genuine OEM and quality alternatives in one place
- In stock: Ready to ship, no backorder delays
- Technical support: Help identifying the right kit for your valve
- Volume discounts: Available for maintenance stock orders
Installation Tips for C113685 Kits
Whether you buy genuine or alternative, proper installation extends life.
Before Installation
- Depressurize the air system completely
- Remove the old diaphragm carefully – do not scratch the sealing surface
- Inspect the valve body seat for nicks or pitting
- Clean the cavity thoroughly
During Installation
- Install the new diaphragm without twisting
- Ensure the bleed hole aligns correctly
- Replace the pilot seal and spring
- Torque bonnet screws evenly (4-6 Nm for 2″ valves)
After Installation
- Pressurize slowly and check for leaks
- Cycle the valve several times to verify operation
- Listen for audible leaks from the vent port when closed
Signs Your C113685 Diaphragm Needs Replacement
Watch for these failure indicators:
- Hissing air from the vent port
- Valve fails to open or close
- Weak pulse pressure
- Visible cracking or hardening of the rubber
- Increased pressure drop across the dust collector
Conclusion
The ASCO C113685 diaphragm repair kit is essential maintenance for 2″ and 2-1/2″ ASCO pulse valves. Both genuine OEM and high-quality alternatives have their place.
Key takeaways:
- Genuine ASCO guarantees exact fit and material consistency at a premium price
- Quality alternatives offer significant savings with comparable performance for standard conditions
- Your choice depends on application criticality, budget, and operating environment
- BM Pneumatics stocks both options with technical support to help you decide
Ready to order your C113685 repair kits? Browse our genuine ASCO and alternative options below. Need help choosing? Contact our team with your valve model number for a recommendation.