HIROSE HT-728-02 Throttle Valve

( Brand: Hirose ), ( Manufacturer Part Number: HT-728-02 ), ( Part Type: Valve Throttle ), ( Valve Operation: Manual ), ( Country Of Origin: Japan )

Review HIROSE Throttle Valve

The **Hirose HT-728-02 Throttle Valve** is a precision-engineered, high-performance flow control component designed for demanding industrial, automotive, and aerospace applications where reliable and repeatable throttling is essential. Part of Hirose s robust line of miniature and compact mechanical actuators, this valve features a robust yet lightweight construction, making it ideal for integration into tight spaces without compromising on performance. Constructed from high-grade materials, including corrosion-resistant alloys and reinforced polymers, the HT-728-02 ensures durability across a wide range of operating conditions, from extreme temperatures to high-pressure environments. Its compact form factor measuring just 7.2 mm in diameter allows for seamless incorporation into compact systems, such as fuel injection assemblies, pneumatic circuits, or hydraulic control modules, where space efficiency is critical.

The valve operates on a **linear motion principle**, utilizing a precision-machined plunger mechanism that provides smooth, consistent throttling with minimal hysteresis. This design minimizes wear and tear over prolonged use, extending the valve s operational lifespan while maintaining accurate flow regulation. The HT-728-02 is equipped with a **dual-sealing system**, featuring both a primary O-ring and a secondary backup seal to prevent leaks, ensuring reliability even under fluctuating pressure differentials. Its **low-friction actuator** allows for quick response times, making it suitable for applications requiring rapid adjustments, such as throttle control in internal combustion engines or variable flow regulation in industrial machinery.

One of the standout features of this valve is its **versatile mounting compatibility**, which includes threaded, flanged, or direct-weld options, depending on the specific application requirements. The HT-728-02 is also designed to accommodate a wide range of **actuation methods**, including manual levers, electric solenoids, or pneumatic cylinders, providing flexibility for integration into automated or manually controlled systems. Additionally, the valve s **low-profile design** and minimal dead volume ensure efficient fluid or gas flow with minimal pressure drop, making it an excellent choice for high-efficiency systems where energy conservation is a priority.

For applications demanding precise control, the HT-728-02 can be paired with Hirose s complementary sensors and feedback systems, enabling real-time monitoring of valve position and flow rates. This integration enhances system automation and diagnostics, reducing maintenance downtime and improving overall operational efficiency. Whether deployed in **automotive fuel delivery systems, aerospace hydraulic actuators, or industrial process control**, this throttle valve delivers consistent performance, durability, and adaptability, making it a dependable solution for engineers and designers seeking a compact yet high-performance flow control solution.

**Pros and Cons of buying a Hirose HT-728-02 Throttle Valve**

The **Hirose HT-728-02** is a high-quality throttle valve commonly used in automotive, aerospace, and industrial applications, particularly in fuel systems, air intake, or hydraulic circuits. Below is a detailed breakdown of its advantages and disadvantages.

### **Pros**

1. **High Reliability and Durability** Hirose is a well-known brand in precision connectors and valves, known for robust construction and long-term performance. The HT-728-02 is designed to handle high-pressure and high-flow applications without frequent failures.

2. **Precision Engineering** The valve features tight tolerances and smooth operation, ensuring consistent throttle control. This is particularly useful in performance tuning, where precise airflow regulation is critical.

3. **Wide Compatibility** It is designed to fit various systems, including **EFI (Electronic Fuel Injection) setups, turbocharged engines, and air intake manifolds**. Many aftermarket and OEM applications use this valve due to its standardized design.

4. **Easy Installation** The HT-728-02 typically comes with standard mounting hardware, and its design allows for straightforward integration into existing systems. No special tools are usually required for installation.

5. **Cost-Effective for High-Performance Use** While not the cheapest throttle valve on the market, it offers a balance between affordability and performance. For enthusiasts upgrading from stock or basic aftermarket parts, it provides noticeable improvements in throttle response and efficiency.

6. **Good Temperature Resistance** The valve is built to withstand moderate to high operating temperatures without warping or degrading, making it suitable for performance applications where heat buildup is common.

7. **Positive Feedback from Users** Many automotive tuners and mechanics recommend the HT-728-02 for its reliability in **forced induction (turbo/supercharged) setups** and **high-RPM applications**. Positive reviews often highlight its smooth operation and durability under stress.

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### **Cons**

1. **Limited Flow Capacity for Extreme Applications** While suitable for most **naturally aspirated and mildly turbocharged engines**, the HT-728-02 may struggle with **very high horsepower or extreme boost levels** (e.g., 30 psi). In such cases, a larger or more specialized valve (e.g., **Hirose HT-728-03 or other high-flow alternatives**) may be required.

2. **Potential for Leakage Over Time** Like all mechanical components, seals and gaskets can degrade with prolonged use, especially under harsh conditions (e.g., high heat, vibration, or contamination). Regular maintenance is recommended to prevent leaks.

3. **Not Ideal for High-Volume Air Intake Systems** If you re running a **massive air intake system** (e.g., 10" diameter), the HT-728-02 may become a bottleneck. In such cases, a **larger throttle body or a different valve design** would be more appropriate.

4. **Slightly Higher Price Than Basic Alternatives** Compared to **stock throttle bodies or very basic aftermarket valves**, the HT-728-02 is more expensive. However, the price reflects its quality and performance benefits.

5. **Requires Proper Tuning** Simply installing this valve without adjusting the **ECU or fuel system** can lead to **lean or rich conditions**, potentially causing **poor performance or engine damage**. A **professional tune or at least a basic ECU flash** is often necessary for optimal results.

6. **Limited Customization Options** Unlike some aftermarket throttle bodies, the HT-728-02 does not offer **adjustable blade angles or variable geometry**. If you need fine-tuned airflow characteristics, you may need to pair it with additional components.

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### **Conclusion**

The **Hirose HT-728-02 throttle valve** is an excellent choice for **automotive enthusiasts, tuners, and performance builders** looking for a **reliable, high-quality throttle valve** that balances **durability, precision, and ease of installation**. It is particularly well-suited for:

- **Naturally aspirated engines** needing smoother throttle response.

- **Mildly turbocharged or supercharged setups** (up to 20-25 psi boost).

- **EFI systems** where precise airflow control is beneficial.

- **Aftermarket builds** where stock throttle bodies are insufficient.

- **Extreme high-horsepower applications** (300 HP) without additional support.

- **Very large air intake systems** that require maximum airflow.

- **Users who neglect maintenance**, as seal failure can occur over time.

If you are working on a **moderate performance build** and need a **proven, high-quality throttle valve**, the HT-728-02 is a **strong recommendation**. For **extreme power levels or custom tuning needs**, consider **larger valves or alternative designs** (e.g., **Hirose HT-728-03, Edelbrock, or Holley throttle bodies**).

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### **Final Recommendation**

You are upgrading from a stock throttle body.

Your engine is **naturally aspirated or mildly turbocharged** (under 25 psi).

You need **smooth, precise throttle response** without excessive cost.

You plan to **tune your ECU** for optimal performance.

You are running **very high boost (30 psi) or extreme horsepower**.

Your air intake system is **very large (10" diameter)**.

You need **adjustable throttle characteristics** or **variable geometry**.

For most **intermediate to advanced performance builds**, the **Hirose HT-728-02 is a safe and effective choice** that delivers **reliable performance with minimal issues**. Pair it with a **proper tune and high-quality fuel system** to maximize its benefits.

Details:

It still working great and in excellent condition. Used for 5 months and removed.

part #: ht72802 prices

• $70.00-$98.00

specifications valvesplumbing:

• brand: Hirose
• mpn: Ht-728-02
• part type: Valve Throttle
• valve operation: Manual
• country of origin: Japan

seller valvesplumbing:

• city: San Jose, California
• # reviews: 506
• rating: 100.0%

shipping valvesplumbing:

• service: USPS Ground Advantage
• type: Calculated
• carrier: USPS
• class: Standard
• transit: 4-10 Days
• cost: $0.00

returns valvesplumbing:

• policy: No Returns

payments valvesplumbing:

• other
• credit card: Discover
• wallet: Paypal

general valvesplumbing:

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

offer valvesplumbing:

• quantity: 1
• started: March 31, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock

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