STEEL VALVES

manufacture since 2013

What we offer

EXPLORE OUR PRODUCTS

GATE VALVE

GLOBE VALVE

BALL VALVE

CHECK VALVE

BUTTERFLY VALVE

STRAINER

WHAT WE CAN MAKE

  1. Material:

    • Body Material:
      • Stainless Steel (e.g., SS 304, SS 316)
      • Carbon Steel (e.g., WCB – ASTM A216, LCB – ASTM A352)
      • Brass
      • Cast Iron (e.g., ASTM A126)
    • Trim Material:
      • Stainless Steel (e.g., SS 304, SS 316)
      • Bronze
  2. Size and Connection Standards:

    • Size: Ranging from 1/2 inch to 48 inches (or larger for specific applications)
    • Connection Type:
      • Flanged
      • Threaded (NPT, BSPT)
      • Butt Weld
      • Socket Weld
  3. Operation Mode:

    • Manual Operation: Handwheel, Gear Operated
    • Automated Operation: Electric Actuator, Pneumatic Actuator, Hydraulic Actuator
  4. Pressure Rating:

    • Class 150, Class 300, Class 600, Class 900, Class 1500, Class 2500
  5. Temperature Range:

    • Varies based on material and design (e.g., -29°C to 427°C for WCB)
  6. Structure and Design Features:

    • Wedge Type: Solid Wedge, Flexible Wedge, Split Wedge(gate valve only)
    • Bonnets: Screwed Bonnet, Bolted Bonnet, Welded Bonnet
    • Seat and Seal Materials: Metal Seats, PTFE, Reinforced PTFE
  7. End-User Applications:

    • Water, Steam, Oil, Gas, Chemicals
  8. Standards Compliance:

    • API, ANSI, ASTM, GB, JIS, DIN, GOST
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Trusted Clients
Our Service

INDUSTRIES WE SERVE

  • Natural Gas Extraction & Processing Industry
  • Petroleum Refinery Industry
  • Chemical Refinery Industry
  • Marine Plumbing Industry
  • Power Generation Industry
  • Pipeline Transportation Industry
Our Service

TESTING LINE

  • Material testing machine
  • Thickness gauge machine
  • Impact testing machine
  • Magnetic particles machine
  • Hardness tester
  • NDE test equipment
  • Tensile testing machine
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Trusted Clients
Client Testimonial

What they say about Steel Merge

Clients laud Steel Merge for its professional solution design, top-quality products, and prompt deliveries, consistently acknowledging the company’s significant contribution to the efficiency and success of their projects.

Gate Valve V.S. Globe Valve

  1. Operational Mechanism:

    • Gate Valve: Utilizes a linear motion gate which moves perpendicular to the flow, allowing for minimal resistance when open.
    • Globe Valve: Employs a stem and plug mechanism, with the plug moving parallel to the flow, resulting in variable resistance and precise flow control.
  2. Flow Characteristics:

    • Gate Valve: Offers a full-bore, unobstructed flow path when open, leading to negligible friction loss and minimal pressure drop.
    • Globe Valve: Characterized by a change in flow direction within the valve, causing a higher pressure drop, beneficial for throttling purposes.
  3. Application Suitability:

    • Gate Valve: Ideal for applications where the valve will remain either fully open or closed for extended periods, such as in pipeline isolation.
    • Globe Valve: More suited for applications requiring frequent and precise flow adjustments, such as in cooling systems or fuel oil handling.
  4. Energy Efficiency:

    • Gate Valve: More energy-efficient in fully open or closed positions due to reduced pressure drop.
    • Globe Valve: Less energy-efficient due to inherent pressure drop, but offers superior control in throttling applications.
  5. Installation and Orientation Flexibility:

    • Gate Valve: Can be installed in any orientation, providing versatility in system design.
    • Globe Valve: Typically requires specific orientation due to its flow directionality and internal design.
  6. Sealing Efficiency:

    • Gate Valve: Provides a tight seal when closed, making it effective for isolation.
    • Globe Valve: Though capable of sealing, its design focuses more on flow control than on creating a tight seal.
  7. Wear and Tear:

    • Gate Valve: Less prone to wear when used correctly (fully open or closed), but can be damaged by vibration if partially opened.
    • Globe Valve: More prone to wear due to the throttling action, which can cause seat and disk erosion.
  8. Cost Implications:

    • Gate Valve: Generally less expensive and lighter, beneficial for large-scale applications.
    • Globe Valve: Tends to be more expensive due to its complex design and manufacturing requirements.

 

In summary, the choice between a gate valve and a globe valve hinges on the specific requirements of the application, considering factors like flow control precision, pressure drop considerations, operational frequency, and cost implications. Professional assessment is crucial for optimal system performance and longevity.

 

Ball Valve V.S. Globe Valve

  1. Flow Direction and Control:

    • Globe Valve: Offers unidirectional flow with excellent control over flow rate and pressure.
    • Ball Valve: Provides bidirectional flow with quick on/off control but less precise flow regulation.
  2. Internal Design Complexity:

    • Globe Valve: More complex design, leading to a higher pressure drop but allowing fine-tuned control.
    • Ball Valve: Simpler design with a lower pressure drop, suitable for rapid on/off operations.
  3. Operational Speed and Efficiency:

    • Globe Valve: Slower operation due to the need for multiple turns; more suitable for gradual flow adjustments.
    • Ball Valve: Fast operation with quarter-turn functionality, ideal for swift shut-off requirements.
  4. Sealing Capabilities:

    • Globe Valve: Provides adequate sealing but primarily designed for flow control.
    • Ball Valve: Excellent sealing capabilities, particularly suitable for gas applications.
  5. Energy Considerations:

    • Globe Valve: Less energy-efficient due to inherent pressure drop, but offers precision in throttling.
    • Ball Valve: More energy-efficient in applications requiring minimal pressure drop.
  6. Application Suitability:

    • Globe Valve: Preferred in systems where flow needs to be modulated or adjusted frequently.
    • Ball Valve: Favored in systems that require a reliable and quick means of starting or stopping flow.
  7. Cost and Maintenance:

    • Globe Valve: Generally more costly and requires more maintenance due to its complexity.
    • Ball Valve: Typically more cost-effective and easier to maintain.

 

Selecting between a globe valve and a ball valve depends on the specific operational requirements, such as the need for flow control precision, speed of operation, sealing requirements, and maintenance considerations. Professional evaluation ensures optimal choice for system efficiency and durability.

 

 
Why Choose Us

TOP CONCERNS WHEN PURCHASING

VALVE SIZE

Valve diameter is restricted due to internal flow media pressure. Globe valve manufacturers cap sizes at NPS 12 or DN 300, as larger valves struggle to open or close under pressure.

VALVE TRIM

For throttling and pressures over 200 psi, valve trims often fail. It's advisable to request a specialized valve trim in such cases.

P-T RATING

The P-T rating indicates a valve's maximum pressure-temperature ratio based on its metal material. Higher temperatures reduce the valve's pressure capacity, with the seat material and design also influencing the rating.

OPERATING MEDIUM

Not all valve designs suit every medium; for instance, slurries, being heavy with larger components, can damage valve disks and cause significant pressure drops.

VALVE MATERIAL

The valve's lifespan is directly impacted by the flow medium's properties and the valve material's corrosion resistance. Key considerations include the medium's concentration and whether it will flow continuously or intermittently.

COMPLIANTS STANDARDS

By following and meeting industry standards, it maintains the integrity of the valve as well as provide safety assurance.Like:the American Society of Mechanical Engineers (ASME) American Petroleum Institute (API) The Manufacturers Standardization Society (MSS) of Valve Fittings

WHY SAME WEIGHT VALVE STILL HAS PRICE DIFFERENCE?

The quality of the stainless steel billets used can affect the price. We all use Qingshan or Yongxing billets.Higher purity billets that offer improved performance characteristics can be more expensive.

Pipes that undergo cold rolling or cold drawing require significant energy and expertise to maintain precise dimensional tolerances and superior mechanical properties, such as strength and hardness.

Advanced annealing or quenching and tempering processes, which can enhance the material's corrosion resistance and durability, may lead to higher costs.
 

Additional surface treatments like pickling, passivation, or polishing to achieve a specific finish or extra corrosion resistance can increase the manufacturing cost.

The quality of the stainless steel billets used can affect the price. We all use Qingshan or Yongxing billets.Higher purity billets that offer improved performance characteristics can be more expensive.

Pipes that undergo cold rolling or cold drawing require significant energy and expertise to maintain precise dimensional tolerances and superior mechanical properties, such as strength and hardness.

Advanced annealing or quenching and tempering processes, which can enhance the material's corrosion resistance and durability, may lead to higher costs.
 

Additional surface treatments like pickling, passivation, or polishing to achieve a specific finish or extra corrosion resistance can increase the manufacturing cost.

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