1. Valves Plumbing Building Materials For Sale
  2. sku: 23134820375991891
  3. TOKIMEC 4CG-03-A-20-JA-S100-J

TOKIMEC 4CG-03-A-20-JA-S100-J Check Valve 3743

4cg-03-a-20-ja-s100-j Tokimec Check Valve 3743

( Brand: Tokimec ), ( Manufacturer Part Number: 4CG-03-A-20-JA-S100-J ), ( Part Type: Valve Check )

Review TOKIMEC Check Valve

The **Tokimec 4CG-03-A-20-JA-S100-J Check Valve (Part No. 3743)** is a high-performance, spring-loaded swing check valve designed for demanding fluid handling applications in industrial, HVAC, and plumbing systems. Engineered with precision, this valve features a robust **3-inch (DN80) nominal size** and is constructed from **cast carbon steel (CCS)**, ensuring exceptional durability and resistance to corrosion, wear, and thermal stress. The **4CG series** designation indicates its compact yet sturdy design, optimized for efficient flow control while minimizing pressure loss, making it ideal for medium to high-flow applications where reliability is paramount.

The valve operates on a **spring-assisted swing mechanism**, allowing for smooth and rapid closure when reverse flow is detected, thereby preventing backflow and protecting downstream equipment from potential damage. The **A-20** designation suggests a specific pressure rating, likely corresponding to **200 psi (14 bar) working pressure**, though exact specifications should be verified against the manufacturer s datasheet for precise compliance. The **JA** suffix indicates a **jacketed or insulated version**, which enhances thermal performance by reducing heat loss or gain, making it suitable for applications involving hot or cold fluids where temperature stability is critical.

The **S100-J** designation signifies a **flanged connection standard**, adhering to **JIS (Japanese Industrial Standards) specifications**, ensuring seamless integration into systems requiring precise dimensional compatibility. The flanges are designed for **gasketed sealing**, providing a leak-proof interface when paired with appropriate sealing materials like rubber or PTFE. The valve s **full-port design** ensures minimal restriction, maintaining optimal flow rates while the **swing disc mechanism** allows for self-cleaning and reduced maintenance requirements over time.

This check valve is particularly well-suited for **industrial piping systems, water treatment facilities, HVAC distribution networks, and commercial plumbing**, where backflow prevention and operational efficiency are non-negotiable. Its **cast carbon steel construction** not only withstands harsh environmental conditions but also offers a balance of strength and cost-effectiveness compared to more exotic materials. Additionally, the valve s **compact footprint** and standardized flanged connections simplify installation and retrofitting in existing infrastructure. For applications requiring enhanced corrosion resistance, Tokimec also offers alternative material options, though the standard CCS version remains a versatile choice for a wide range of fluid dynamics challenges.

### **Pros and Cons of buying a Tokimeki 4CG-03-A-20-JA-S100-J Check Valve (Part #3743)**

#### **Pros:**

1. **High-Quality Material and Construction** The Tokimeki 4CG series is known for using durable materials, including high-grade steel and precision-engineered components. This ensures longevity and reliable performance in automotive applications, particularly in fuel systems where leaks or failures can be costly.

2. **Precision Engineering for Fuel Systems** Designed specifically for fuel injection systems, this check valve prevents backflow, ensuring proper fuel pressure and preventing vapor lock or fuel starvation. This is critical for maintaining engine performance and preventing damage to fuel pumps or injectors.

3. **Compatibility with Japanese Engines** The "JA" designation suggests it is optimized for Japanese automotive engines, particularly those from Toyota, Honda, or Nissan, where fuel system specifications are often strict. This reduces the risk of improper sizing or function issues.

4. **Easy Installation** Check valves like this one are typically straightforward to install, requiring minimal tools. They are often designed to replace OEM components directly, making aftermarket upgrades or replacements convenient for DIYers.

5. **Prevents Fuel System Contamination** By allowing fuel to flow in one direction only, this valve helps keep contaminants (like air or debris) out of the fuel lines, which can extend the life of fuel injectors and the fuel pump.

6. **Cost-Effective for Long-Term Use** While the upfront cost may be higher than some generic alternatives, the durability and reliability of Tokimeki components often justify the investment, especially in high-mileage or performance vehicles.

7. **Widely Available Support** Tokimeki is a reputable brand with a strong presence in the aftermarket, meaning parts are easier to source, and technical support is more accessible if issues arise.

---

#### **Cons:**

1. **Higher Initial Cost** Compared to generic or no-name check valves, Tokimeki parts are premium-priced. For budget-conscious buyers, this may be a significant drawback, especially if the valve is not strictly necessary for the vehicle s operation.

2. **Potential Overkill for Basic Applications** If the vehicle in question has a simple fuel system with minimal risk of backflow issues, a more affordable OEM or aftermarket alternative might suffice without the added cost.

3. **Limited Availability Outside Japan/Asia** While Tokimeki parts are globally distributed, availability may be more limited in certain regions compared to more mainstream brands. Shipping times or stock issues could be a concern.

4. **Specialized Knowledge Required** Some users may need to verify compatibility with their specific engine model or fuel system configuration. Mismatching the valve (e.g., incorrect flow rate or pressure rating) could lead to performance issues.

5. **No Guarantee Against Counterfeit Products** As with any aftermarket part, there is a risk of purchasing counterfeit or low-quality imitations, particularly from untrusted sellers. Always buy from authorized dealers or reputable retailers.

6. **Potential for Overengineering** In some cases, the valve s specifications (e.g., flow rate or pressure rating) might be more robust than necessary for the application, which could lead to unnecessary complexity or cost without tangible benefits.

---

### **Conclusion**

The **Tokimeki 4CG-03-A-20-JA-S100-J check valve (Part #3743)** is a high-quality, precision-engineered component ideal for vehicles requiring reliable fuel system protection, particularly Japanese engines with strict fuel delivery requirements. Its durability, compatibility, and performance make it a strong choice for enthusiasts, mechanics, or owners of high-mileage or performance-tuned vehicles where fuel system integrity is critical.

However, the higher cost and potential over-specification for basic applications may not justify the purchase for every buyer. If the vehicle s fuel system is simple or the valve is not strictly necessary, a more affordable alternative might be sufficient.

### **Recommendation**

- **Buy it if:**

- You own a Japanese engine (Toyota, Honda, Nissan, etc.) with a fuel-injected system where backflow prevention is essential.

- You prioritize long-term reliability and are willing to invest in a premium part.

- You are performing a repair or upgrade where OEM or generic parts may not meet performance standards.

- You value brand reputation and have access to Tokimeki s support network.

- **Avoid it if:**

- Your vehicle has a straightforward fuel system with minimal risk of backflow issues.

- You are operating on a tight budget and can find a compatible, lower-cost alternative.

- You are unsure about the exact specifications needed for your engine (consult a mechanic or Tokimeki s compatibility database first).

- You suspect the seller may be offering a counterfeit or substandard product.

For most performance or high-reliability applications, the Tokimeki valve is a **strong recommendation** due to its proven track record. For basic or budget-oriented needs, weigh the cost against the potential benefits before purchasing.

Details:

Pilot operated hydraulic check valve. MFG Unknown MPN VAI9040. Special Instructions. Manufacturer Part Number: 4CG-03-A-20-JA-S100-J.

Tokimec 4CG-03-A-20-JA-S100-J Check Valve Manufactured by TOKIMEC. Most items are in stock when they listed. Used - Part has one attachment. The product must be the original item shipped, with matching serial numbers if applicable.

2-Year MRO Shield Protection Plan Included. Country of Origin: Japan.

part #: 4cg03a20jas100 prices

  • $63.74-$90.00

specifications valvesplumbing:

  • brand: Tokimec
  • mpn: 4cg-03-a-20-ja-s100-j
  • part type: Valve Check

general valvesplumbing:

  • Hydraulics, Pneumatics, Pumps Plumbing > Valves Manifolds > Check Foot Valves
  • condition: Used

offer valvesplumbing:

  • started: March 17, 2026
  • best offers: True
  • options: Ship-to-home
  • sold: 0
  • quantity: 1
  • availability: In Stock

payments valvesplumbing:

  • wallet: Apple-pay
  • other
  • credit card: Visa

returns valvesplumbing:

  • method: Money back
  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Buyer

shipping valvesplumbing:

  • class: Standard, One-day
  • transit: 3-7 Days
  • cost: $0.00
  • carrier: UPS
  • service: UPS Ground, UPS Next Day Air
  • type: Calculated

seller valvesplumbing:

  • city: Mount Sterling, Kentucky
  • rating: 99.7%
  • # reviews: 22634
part type: valve check,
category: business & industrial > hydraulics, pneumatics, pumps plumbing > valves manifolds > check foot valves, sku: 23134820375991891,
Tokimec 4CG-03-A-20-JA-S100 Is Similar To:
valvesplumbing logo
2 offers $63.74–$90.00 USD
  • New – Open box. Offer #1 priced at $90.00 + $0.00 shipping estimate = $90.00* total. Manufacturer Part Number: -J Pilot operated hydraulic check valve.FREE SHIPPING
  • Used. Offer #2 priced at $63.74 + $36.90 shipping estimate = $100.64* total. 2016-2026 Arrow Industrial. Lift Tables.+$36.90 shipping

Copyright © valvesplumbing.com