Description
Buy Industrial Steam Pressure Regulating Valve Y43H/Y43F | PN1.6/2.5/4.0 | Cast Steel | Self-Controlled
The Y43H/F Steam Pressure Reducing Valve by VALVEHU is a pilot-operated control valve engineered for accurate and stable pressure reduction in saturated steam systems. Designed for applications where downstream pressure must remain constant regardless of upstream fluctuation, this valve features a highly sensitive response and excellent sealing performance. It is suitable for use in various steam lines in heating, power, chemical, and industrial processing systems.
This pressure-reducing valve is available in several pressure ratings, including 1.6 MPa, 2.5 MPa, and 4.0 MPa, covering a wide range of industrial needs. It integrates a diaphragm and pilot mechanism for high precision and stability. With a pressure adjustment range of 0.05–0.8 MPa, it ensures effective downstream pressure control even under variable load conditions.
Constructed with durable materials and a compact body structure, the valve supports vertical or horizontal installation and simplifies maintenance. The Y43H/Y43F series ensures a leakage rate of ≤ 0.07 MPa and is offered in various outlet pressure types such as Y43H/Y43F-16, Y43H/Y43F-25, and Y43H/Y43F-40. It includes an integrated pressure adjustment spring and can operate under an inlet pressure of up to 4.0 MPa, making it ideal for medium- and high-pressure steam applications.
The product is equipped with precise dimension interfaces for consistent installation and is compliant with modern industrial standards. Whether you are looking for safety, control, or durability, this valve provides a reliable solution.
If you’re seeking dependable steam pressure regulation or need assistance selecting the right valve, reach out to our VALVEHU experts in China — we’re here to support your engineering and procurement needs.
Technical Specifications
- Model: Y43H / Y43F series
- Nominal Pressure: 1.6 MPa, 2.5 MPa, 4.0 MPa
- Outlet Pressure Range: 0.05 – 0.8 MPa (varies by model)
- Leakage Rate: ≤ 0.07 MPa
- Design Type: Pilot-operated with diaphragm mechanism
- Connection Type: Flanged ends
- Medium: Saturated steam
- Body Material: Cast Steel or Cast Iron (varies by model)
- Flow Capacity (Cv): Ranges from 2.5 to 12.0 depending on DN size
- Applicable Standards: Designed for industrial-grade steam systems
Main Technical Parameters and Performance of Steam Pressure Reducing Valve
| Nominal Pressure (MPa) | Test Pressure (MPa) | Pressure Regulating Range (MPa) | Outlet Pressure Deviation | Applicable Temperature (°C) | |||
|---|---|---|---|---|---|---|---|
| Inlet Pressure | Outlet Pressure | Y43H | |||||
| Strength | Sealing | ||||||
| Y43H/Y–16 | |||||||
| 1.6 | 2.4 | 1.76 | 0.25～1.27 | 0.05～1 | ≤ ±0.05 | ≤200 | |
| Y43H/Y–25 | |||||||
| 2.5 | 3.75 | 2.75 | 2.5 | 0.1～1.6 | ≤ ±0.07 | 200 | |
| 2.2 | 250 | ||||||
| 1.8 | 280 | ||||||
| Y43H/Y–40 | |||||||
| 4 | 6 | 4.4 | 4 | 1.0～2.5 | ≤ ±0.07 | 200 | |
| 3.3 | 250 | ||||||
| 2.8 | 300 | ||||||
| Y43H/Y–64 | |||||||
| 6.4 | 9.6 | 7.04 | 6.4 | 1.0～3.0 | ≤ ±0.07 | 200 | |
| 5.2 | 250 | ||||||
| 2.9 | 300 |
Main Connection Dimensions – 1.6/2.5 MPa Valve (Unit: mm)
| DN | L | D | D1 | D2 | f | b | n–Φd | H1 | H2 |
|---|---|---|---|---|---|---|---|---|---|
| 20 | 160 | 105 | 85 | 65 | 2 | 16 | 4–Φ14 | 89 | 312 |
| 25 | 180 | 115 | 85 | 65 | 2 | 16 | 4–Φ14 | 101 | 315 |
| 32 | 200 | 135 | 100 | 78 | 2 | 18 | 4–Φ18 | 107 | 320 |
| 40 | 220 | 145 | 110 | 85 | 3 | 18 | 4–Φ18 | 113 | 325 |
| 50 | 250 | 160 | 125 | 100 | 3 | 18/20 | 4–Φ18 | 120 | 335 |
| 65 | 260 | 180 | 145 | 120 | 3 | 18/22 | 8–Φ18 | 125 | 340 |
| 80 | 310 | 195 | 160 | 135 | 3 | 20/22 | 8–Φ18 | 140 | 360 |
| 100 | 350 | 215/230 | 180/190 | 155/160 | 3 | 20/24 | 8–Φ18/Φ23 | 150 | 390 |
| 125 | 400 | 240/270 | 210/220 | 185/188 | 3 | 22/28 | 8–Φ18/Φ25 | 190 | 415 |
| 150 | 450 | 280/300 | 240/250 | 210/218 | 3 | 24/30 | 8–Φ23/Φ25 | 205 | 440 |
| 200 | 500 | 335/360 | 295/310 | 265/278 | 3 | 26/34 | 12–Φ23/Φ30 | 220 | 475 |
| 250 | 600 | 405/425 | 355/370 | 295/332 | 3 | 30/36 | 12–Φ25/Φ30 | 270 | 545 |
| 300 | 700 | 460/485 | 410/430 | 385/390 | 4 | 30/40 | 12–Φ25/16–Φ30 | 335 | 575 |
| 350 | 800 | 520/550 | 470/490 | 435/448 | 4 | 34/44 | 16–Φ25/Φ34 | 390 | 650 |
| 400 | 900 | 580/610 | 525/550 | 485/505 | 4 | 36/48 | 16–Φ30/Φ34 | 430 | 705 |
FAQ
What pressure classes are available for the Y43H/F steam valve?
Available in PN16, PN25, and PN40 (1.6, 2.5, and 4.0 MPa), covering most industrial applications.
Is this valve suitable for saturated steam?
Yes, it is specifically designed for saturated steam pipelines in industrial systems.
What’s the leakage performance of this valve?
It maintains a leakage rate of ≤ 0.07 MPa, ensuring safe and stable operation.
Does the valve require external power for operation?
No, it is self-operated using a diaphragm and pilot system, requiring no external power.
Can the Y43H/F valve be installed vertically or horizontally?
Yes, the design supports both vertical and horizontal installations, offering flexibility for various pipeline layouts.
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