Features
Three functions are available with only one valve:(1)Check valve without water hammer.(2)Gate valve. (3)Balancing valve.
The spring force makes the disc closed first once the pump stops continual running so as to avoid water hammer.
Output quantity of the pump can be regulated through the opening adjustment.
Mounted with an indicator,so the valve's opening can be seen by eyes.
The seal pad is made of chemigum,no leak with it at all and capable of absorbing impact.
The spring is made of stainless steel,of a strong anti-corrosiveness.
A great deal of equipment materials and costs can be saved and the installation space can be reduced.
A very small step-down because of the streamline type of both shape and structure.
Due to the by-pass action,it is of the function to retrieve the water inside of the pipeline on the outlet and to supplement water when vacuum occurs on the inlet side.Mountable on eitherhorizontal or vertical pipeline.
The horizontal pipeline,on the vertical pipeline has the installment.
Technical data
公称通经DN(mm) Nominal diameter | 50~1000 |
公称压力PN(MPa) Nominal pressure | 1.0 |
适用温度℃ Working temperature | ≤80 |
适用介质 Suitable mediums | 水、油 Water,Oil |
允许渗漏量 Allowed leakage | 0 |
Meterial of main parts
阀体、阀瓣 Valve body, valve disc | 阀座 Valve Seat | 密封垫 Sealing pad | 弹簧 Spring |
铸铁、铸钢 Cast iron、 cast steel | 铸钢 Cast steel | 丁腈橡胶 NBR | 不锈钢 Stainless steel |
Main dimensions
DN(mm) |
L |
H | D | D1 | n-φd | |||||||
1.0MPa | 1.6MPa | 2.5MPa | 1.0MPa | 1.6MPa | 2.5MPa | 1.0MPa | 1.6MPa | 2.5MPa | ||||
50 | 205 | - | 293 | 165 | 165 | 165 | 125 | 125 | 125 | 4-φ18 | 4-φ18 | 4-φ18 |
65 | 215 | - | 328 | 185 | 185 | 185 | 145 | 145 | 145 | 4-φ18 | 4-φ18 | 8-φ18 |
80 | 250 | - | 364 | 200 | 200 | 200 | 160 | 160 | 160 | 8-φ18 | 8-φ18 | 8-φ18 |
100 | 320 | - | 418 | 220 | 220 | 235 | 180 | 180 | 190 | 8-φ18 | 8-φ18 | 8-φ22 |
125 | 365 | - | 481 | 250 | 250 | 270 | 210 | 210 | 220 | 8-φ18 | 8-φ18 | 8-φ22 |
150 | 415 | 380 | 543 | 285 | 285 | 300 | 240 | 240 | 250 | 8-φ22 | 8-φ22 | 8-φ26 |
200 | 500 | 450 | 673 | 340 | 340 | 360 | 295 | 295 | 310 | 8-φ22 | 12-φ22 | 8-φ26 |
250 | 600 | 540 | 792 | 395 | 405 | 425 | 350 | 355 | 370 | 12-φ22 | 12-φ26 | 12-φ26 |
300 | 680 | 600 | 927 | 445 | 460 | 485 | 400 | 410 | 430 | 12-φ22 | 12-φ26 | 12-φ30 |
350 | 780 | 635 | 957 | 505 | 520 | 555 | 460 | 470 | 490 | 16-φ22 | 16-φ26 | 16-φ33 |
400 | 860 | 700 | 1188 | 565 | 580 | 620 | 515 | 525 | 550 | 16-φ26 | 16-φ30 | 16-φ36 |
450 | 920 | 780 | 1218 | 615 | 640 | 670 | 565 | 585 | 600 | 20-φ26 | 20-φ30 | 20-φ36 |
500 | 980 | 810 | 1256 | 670 | 715 | 730 | 620 | 650 | 660 | 20-φ26 | 20-φ33 | 22-φ36 |
600 | 1100 | 900 | 1600 | 780 | 840 | - | 725 | 770 | - | 20-φ30 | 20-φ36 | - |
700 | 1450 | 980 | 1750 | 895 | 910 | 一 | 840 | 840 | - | 24-φ30 | 24-φ36 | - |
800 | 1560 | 1120 | 1900 | 1015 | 1025 | - | 950 | 950 | - | 24-φ33 | 24-φ39 | - |
900 | 1800 | 1220 | 2100 | 1115 | - | - | 1050 | - | - | 28-φ33 | - | - |
1000 | 2000 | 1320 | 2400 | 1230 | - | - | 1160 | - | - | 28-φ36 | - | - |
Multi-function Three-in-One Check Valve: Materials, Performance, Installation, and User Feedback
The Multi-function Three-in-One Check Valve is an innovative valve solution that integrates backflow prevention, pressure regulation, and flow control into a single unit. By combining multiple functions, it reduces installation space, simplifies piping systems, and improves overall efficiency. Widely used in water supply systems, HVAC pipelines, chemical processing, and industrial applications, this valve offers durability, reliability, and low maintenance.
This article provides a detailed overview of the valve’s material specifications, performance characteristics, installation requirements, and real-world user feedback, helping engineers and procurement specialists make informed decisions.
The choice of material is crucial for the performance and longevity of a multi-function three-in-one check valve.
| Component | Material Options | Purpose / Feature |
|---|---|---|
| Valve Body | Stainless steel, carbon steel, ductile iron, bronze | Provides structural integrity, corrosion resistance, and pressure tolerance |
| Valve Disc | Stainless steel, alloy steel, PTFE-coated metals | Ensures tight sealing and durability |
| Seat | Metal-to-metal, soft sealing (EPDM, PTFE) | Guarantees leak-free performance and smooth operation |
| Spring / Internal Mechanism | Stainless steel, high-grade alloy | Maintains disc position for backflow prevention and flow regulation |
Key Material Advantages:
Corrosion resistance suitable for chemical or water applications.
High-pressure and high-temperature tolerance.
Long service life with minimal maintenance requirements.
This valve combines three key operations into one device:
Check Valve Function: Prevents reverse flow and protects pumps and compressors.
Pressure Regulation: Maintains desired system pressure without additional equipment.
Flow Control: Enables precise control over fluid movement for efficient pipeline management.
The multi-functional integration allows for reduced piping complexity and smaller installation footprint, ideal for systems with limited space.
Advanced disc and seat materials ensure tight sealing under varying pressure conditions, reducing water hammer and system loss.
Water treatment and municipal pipelines
HVAC and cooling systems
Oil, gas, and chemical industries
Industrial manufacturing and process pipelines
| Parameter | Typical Range |
|---|---|
| Pressure Rating | PN10–PN40 / ANSI Class 150–300 |
| Temperature Range | -20°C to +180°C (EPDM seat) / up to 250°C with metal seat |
| Size Range | DN15–DN300 (½″–12″) |

Proper installation ensures optimal performance and longevity of the multi-function valve.
Flow Direction: Align the valve according to the arrow on the body to ensure correct flow operation.
Orientation: Can be installed in horizontal or vertical pipelines; vertical installation requires upward flow.
Flange Connection: Use standard flanges with gaskets to prevent leakage.
Support and Alignment: Avoid stress on the valve body from piping; ensure proper alignment.
Pre-Installation Inspection: Check for debris or damage inside the valve before installation.
System Pressure Test: Conduct hydrostatic or pneumatic testing as per standard before commissioning.
Avoid corrosive environments unless the valve is made of compatible material.
Maintain ambient temperature within the valve’s rated range.
Many users across industrial sectors report significant advantages with multi-function three-in-one check valves:
| User Feedback | Industry | Observation |
|---|---|---|
| Reduced installation complexity and fewer connection points | HVAC | Simplified piping design saved time and reduced labor cost |
| Long-term durability and minimal maintenance | Water treatment | Reliable sealing for over 5 years with minimal inspection |
| Efficient flow control and pressure regulation | Chemical processing | System pressure remained stable, improving process efficiency |
| Space-saving design appreciated in compact industrial setups | Manufacturing | Reduced footprint allowed for easier equipment arrangement |
Overall User Insights:
Integration of three functions into one device reduces system cost.
Proper installation is critical for optimal performance.
Material selection according to medium and pressure is essential.
| Feature | Multi-function Three-in-One Valve | Separate Valves |
|---|---|---|
| Space Requirement | Compact, single unit | Requires multiple valves and extra piping |
| Installation Time | Shorter, fewer connections | Longer, more complex |
| Maintenance | Easier, fewer components | Multiple components to maintain |
| Cost Efficiency | Lower overall system cost | Higher initial and maintenance cost |
| Functionality | Integrated backflow, pressure, flow control | Each function requires a separate valve |
Conduct routine inspection of disc, seat, and internal springs every 6–12 months.
Clean the valve internals if debris is present in the pipeline.
Replace worn gaskets and seals promptly to maintain leak-free performance.
For chemical applications, ensure material compatibility to avoid corrosion.
Keep spare internal components for quick replacement during scheduled downtime.
The Multi-function Three-in-One Check Valve provides an advanced solution for industries requiring backflow prevention, flow control, and pressure regulation within a single, compact unit. Its robust construction, reliable sealing, and user-friendly design make it ideal for water treatment, HVAC, chemical, and industrial pipelines.
By understanding material selection, performance characteristics, installation requirements, and user experiences, engineers and procurement specialists can confidently integrate this valve into their systems.
For companies seeking efficient, space-saving, and reliable valve solutions, the multi-function three-in-one check valve represents a smart investment that enhances operational efficiency while reducing system complexity and maintenance costs.
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