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Multi-function three-in-one check valve

    Multi-function three-in-one check valve

    The Multi-function Three-in-One Check Valve is an advanced non-return valve designed to provide reliable backflow prevention, pressure regulation, and flow control within a single compact unit. Ideal for water supply, HVAC, chemical processing, and industrial pipelines, this valve integrates multiple functions to optimize system efficiency and reduce installation space. Constructed from durable materials such as stainless steel, carbon steel, or ductile iron, it ensures long-lasting performance, corrosion resistance, and minimal maintenance. Its innovative design allows for easy installation, smooth operation, and enhanced protection for pumps, compressors, and pipeline systems.
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Features

  1. Three functions are available with only one valve:(1)Check valve without water hammer.(2)Gate valve. (3)Balancing valve.

  2. The spring force makes the disc closed first once the pump stops continual running so as to avoid water hammer.

  3. Output quantity of the pump can be regulated through the opening adjustment.

  4. Mounted with an indicator,so the valve's opening can be seen by eyes.

  5. The seal pad is made of chemigum,no leak with it at all and capable of absorbing impact.

  6. The spring is made of stainless steel,of a strong anti-corrosiveness.

  7. A great deal of equipment materials and costs can be saved and the installation space can be reduced.

  8. A very small step-down because of the streamline type of both shape and structure.

  9. 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.

  10. 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

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

Introduction

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.


Material Specifications

The choice of material is crucial for the performance and longevity of a multi-function three-in-one check valve.

ComponentMaterial OptionsPurpose / Feature
Valve BodyStainless steel, carbon steel, ductile iron, bronzeProvides structural integrity, corrosion resistance, and pressure tolerance
Valve DiscStainless steel, alloy steel, PTFE-coated metalsEnsures tight sealing and durability
SeatMetal-to-metal, soft sealing (EPDM, PTFE)Guarantees leak-free performance and smooth operation
Spring / Internal MechanismStainless steel, high-grade alloyMaintains 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.


Performance Characteristics

1. Integrated Functionality

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.

2. Compact and Space-Saving Design

The multi-functional integration allows for reduced piping complexity and smaller installation footprint, ideal for systems with limited space.

3. Reliable Sealing and Minimal Leakage

Advanced disc and seat materials ensure tight sealing under varying pressure conditions, reducing water hammer and system loss.

4. Wide Range of Applications

  • Water treatment and municipal pipelines

  • HVAC and cooling systems

  • Oil, gas, and chemical industries

  • Industrial manufacturing and process pipelines

5. Pressure and Temperature Ratings

ParameterTypical Range
Pressure RatingPN10–PN40 / ANSI Class 150–300
Temperature Range-20°C to +180°C (EPDM seat) / up to 250°C with metal seat
Size RangeDN15–DN300 (½″–12″)

Multi-function three-in-one check valve

Installation Conditions

Proper installation ensures optimal performance and longevity of the multi-function valve.

Installation Guidelines:

  1. Flow Direction: Align the valve according to the arrow on the body to ensure correct flow operation.

  2. Orientation: Can be installed in horizontal or vertical pipelines; vertical installation requires upward flow.

  3. Flange Connection: Use standard flanges with gaskets to prevent leakage.

  4. Support and Alignment: Avoid stress on the valve body from piping; ensure proper alignment.

  5. Pre-Installation Inspection: Check for debris or damage inside the valve before installation.

  6. System Pressure Test: Conduct hydrostatic or pneumatic testing as per standard before commissioning.

Environmental Considerations:

  • Avoid corrosive environments unless the valve is made of compatible material.

  • Maintain ambient temperature within the valve’s rated range.


User Feedback and Industry Experience

Many users across industrial sectors report significant advantages with multi-function three-in-one check valves:

User FeedbackIndustryObservation
Reduced installation complexity and fewer connection pointsHVACSimplified piping design saved time and reduced labor cost
Long-term durability and minimal maintenanceWater treatmentReliable sealing for over 5 years with minimal inspection
Efficient flow control and pressure regulationChemical processingSystem pressure remained stable, improving process efficiency
Space-saving design appreciated in compact industrial setupsManufacturingReduced 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.


Advantages Over Traditional Valves

FeatureMulti-function Three-in-One ValveSeparate Valves
Space RequirementCompact, single unitRequires multiple valves and extra piping
Installation TimeShorter, fewer connectionsLonger, more complex
MaintenanceEasier, fewer componentsMultiple components to maintain
Cost EfficiencyLower overall system costHigher initial and maintenance cost
FunctionalityIntegrated backflow, pressure, flow controlEach function requires a separate valve

Maintenance Tips

  • 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.


Conclusion

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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