Quick Summary
The HTW-18C5 modulating valve combines a ball valve body with a 25Nm electric actuator for hydronic HVAC systems. It is used in chilled water and hot water loops for FCU, AHU, and zone control. This modulating valve supports continuous control via signal input, enabling stable flow adjustment and accurate temperature control in BMS projects.
This page explains how the modulating valve is structured and how the actuator matches control signals and system wiring. It helps confirm correct sizing, signal selection, and installation fit. It also supports common project questions and OEM needs, helping ensure proper selection and smooth system integration.
Key Functional Highlights
(This section introduces the main control functions of the modulating valve and actuator assembly, and their engineering value in the relevant HVAC water system.)
(01) Protection Grade IP54
The IP54 protection level allows the modulating valve to operate in typical mechanical rooms with dust and light moisture. This helps reduce actuator damage risk during operation. For exposed installations, it improves long-term stability and lowers maintenance needs.
(02) Dual Power Supply Flexibility
This modulating valve supports both 220V and 24V power supply options. It helps match different control systems and site conditions. This flexibility reduces additional equipment requirements and simplifies installation and commissioning work.
(03) Modulating Control for Accurate Adjustment
The modulating valve supports continuous control signal input for precise flow regulation. This allows stable temperature control under varying loads. It improves system efficiency and helps avoid temperature fluctuation issues. If you need On/Off version, you can refer to this link: HTW-18C5 On/Off.
(04) Wide Size and Configuration Options
The modulating valve is available in 2-way and 3-way configurations from 1/2 inch to 2 inch. This allows proper matching with different piping layouts. Correct sizing supports stable system balance and avoids flow mismatch problems.
(05) BSP Thread for Easy Installation
Standard BSP thread ensures compatibility with most HVAC piping systems. It avoids the need for extra adapters in many cases. This simplifies installation and reduces potential leakage points.
Product Design and Display
(This section shows the valve body, actuator appearance, connection form, or installation dimensions of this modulating valve model.)
Model Code (Sizes, etc)
| Model Code | Size |
|---|---|
| HTW-71-18C5-215/315 | 215=2 way + DN15(1/2 inch); 315=3 way + DN15(1/2 inch) |
| HTW-71-18C5-220/320 | 220=2 way + DN20(3/4 inch); 320=3 way + DN20(3/4 inch) |
| HTW-71-18C5-225/325 | 225=2 way + DN25(1 inch); 325=3 way + DN25(1 inch) |
| HTW-71-18C5-220 refers to a 2-way DN20 (3/4 inch) valve with a standard 220Vac power supply, BSP thread, and SPDT actuator. To confirm the sub-model that suits you, please get in touch with us directly. | |
Technical Specifications
(This section lists the key technical parameters relevant to this modulating valve and actuator model.)
| Parameter | Value |
|---|---|
| Valve Type | Modulating valve |
| Control Signal | Modulating |
| Power Supply | 220V / 24V |
| Connection Type | BSP |
| Flow Characteristics | Equal percentage |
| Adjustable Ratio | 100:1 |
| Leakage Rate | ≤0.01% Kvs |
| Medium Temperature | -5°C – 95°C |
Wiring and Flow Direction
(This section provides the wiring information for the actuator and the flow direction reference for the modulating valve in the relevant HVAC water system.)
Project Fit & Customization
(This section describes project suitability, system limitations, actuator matching conditions, and available OEM options.)
This modulating valve is not suitable for steam systems or corrosive liquids. It should not be used beyond rated pressure or temperature limits. Incorrect signal type or actuator mismatch may cause unstable control or failure.
Despite the limitations mentioned above, certain details—such as power supply, actuator type, connection type, or wire length—can be evaluated based on project needs and order quantity.
OEM supported, including logo printing, label customisation, packaging adjustment, and basic appearance identification. These options can be discussed based on project requirements and order quantity.
Certificates and Compliance
Exhibition Moments
Frequently Asked Questions
Q1. How do I select the correct control signal?
You need to confirm if your controller outputs a compatible modulating signal. The valve must match the signal type. This ensures stable and accurate operation.
Q2. How do I choose the correct valve size?
Valve size depends on pipe diameter and system flow requirement. Proper sizing helps maintain system balance. Incorrect sizing may cause instability.
Q3. Can this valve be used for mixing applications?
Yes, 3-way versions support mixing or diverting flow. It depends on system design. Please confirm piping layout before selection.
Q4. What media and pressure conditions are suitable?
This modulating valve supports water or neutral liquids. Pressure must be within PN40 rating. Always verify system conditions before use.
Q5. What is the MOQ and do you support samples?
We support sample orders for testing. The typical MOQ is 100 units. Trial quantities can be discussed based on project needs.
Q6. How do we place an order?
We confirm your requirements and provide a PI. Payment supports TT, PayPal, or Visa. Terms such as EXW, FOB, or DAP are available.
Q7. What is the lead time?
Standard samples are shipped within 7 days. Custom orders take about 3–5 weeks. Batch orders like 100 units usually take around one month.
Q8. How can the products be shipped?
Courier delivery takes about 7 days to door. Air freight is similar. Sea shipping usually takes over one month depending on destination.
Need Help Choosing the Right Model?
If you are unsure about control signal or sizing, please feel free to get in touch with us. We can help review your project details.
Related Valve Models
To find out other valves, please click here directly: Motorized valves | Ball Valves | PICV
If one is looking for the thermostat also, please click here: FCU Wi-Fi Thermostat | FCU Modbus Thermostat | Heating Thermostat
Final Note
Hydronic HVAC systems require stable flow control for zoning and efficiency. The HTW-18C5 modulating valve acts as a valve body and actuator assembly for precise adjustment. It supports stable operation, improves temperature control accuracy, and helps with long-term system management.
