Vertical And Horizontal Check Valve | Dual Installation Bubble-tight Non-return Industrial Check Valve

Our Vertical And Horizontal Check Valve operates automatically driven by fluid dynamic force, requiring no external power or manual control. It is offered in two installation configurations: vertical lift type with piston disc for vertical piping runs, and horizontal swing type with hinged disc for horizontal pipelines, delivering reliable backflow prevention for any piping layout. With compact structure, excellent sealing and strong corrosion resistance, it meets ANSI FCI 70-2 Class VI, API 598 and ISO 5208 standards. It supports a full range of materials, seal options and connection types, adapting to cryogenic, high-temperature, corrosive and sanitary working conditions, ensuring long-term stable operation across diverse applications.

1.Dual Installation Versatility: Vertical lift check with guided piston disc provides higher opening clearance and stable backflow prevention for vertical risers; horizontal swing check with hinged disc offers lower lift height and quick response for horizontal pipelines. Spring-assisted versions enable operation in any orientation. One product family covers all pipeline orientations, reducing inventory and adapting to limited space layouts.

2.Reliable Backflow & Sealing Performance: Precision-engineered disc and seat deliver ANSI FCI 70-2 Class VI bubble-tight zero leakage for soft-seat models. It effectively prevents reverse flow, cross-contamination and pressure surges, protecting pumps, pipelines and equipment. Optional spring-assisted closure reduces backflow volume and water hammer impact.

3.High-Quality Durable Materials: Body materials include WCB carbon steel, WC6/WC9 Cr-Mo alloy steel, SS304/SS316 stainless steel and low-temperature grades. All wetted surfaces are mechanically polished and optionally electropolished to Ra ≤0.4μm for crevice-free sanitary performance, suitable for biopharmaceutical and food applications.

4.Low Flow Resistance & Energy Saving: Streamlined internal flow path minimizes pressure loss and delivers high flow capacity. The valve opens at minimal cracking pressure and closes smoothly, reducing water hammer, noise and pumping energy consumption, improving overall system efficiency.

5.Easy Maintenance & Long Service Life: Compact simple structure with top-entry bolted bonnet enables in-line inspection, cleaning and part replacement without removing the valve from pipeline. Wear-resistant disc and seat plus anti-corrosion materials extend service life and reduce total cost of ownership.

6.Global Certification Compliance: Holds CE, ISO 9001, NSF/ANSI 61 & 372 (lead-free drinking water), ANSI FCI 70-2 Class VI and API 598 certifications, meeting safety and quality requirements of Europe, North America and global industrial markets, with full traceability documentation.

Vertical And Horizontal Check Valve: automatic non-return, medium force only. Two types: vertical & horizontal. Forward flow: pressure lifts disc - flow passes, unidirectional. Flow stops/reverses: disc drops/swings onto soft seat (PTFE/EPDM/FKM) or metal - blocks flow, prevents backflow, protects pumps/piping. Soft-seated bubble-tight Class VI - zero leakage. Streamlined path - low loss, high capacity, quick open, smooth close, reduces water hammer. Compact, easy maintenance. WCB/SS304/SS316/WC6/WC9, DN15–DN2000, PN1.0–42MPa, -196~550℃. Flange/wafer/threaded/tube weld/tri-clamp. ANSI FCI 70-2 VI, API 598, ISO 5208.

Industrial Sector: Used in petrochemical, metallurgy, power plants, chemical processing and pharmaceutical manufacturing. Suitable for clean steam loops, bioreactors, SIP systems and chemical dosing lines; vertical type fits process risers; horizontal type fits pump discharge lines.

Municipal Engineering: Applied in water supply & drainage, sewage treatment plants, fire protection systems and municipal pipelines. Large-size wafer type is economical for mains; horizontal swing check handles dirty sewage; NSF lead-free option meets potable water regulations.

Agricultural Irrigation: Horizontal swing check is ideal for irrigation pipelines and pump stations. Low pressure drop saves pump energy; spring-assisted version ensures positive closure at low pressure; durable construction withstands outdoor field conditions.

Commercial & Residential: Used for HVAC systems, water heaters, plumbing and potable water pipelines. Lead-free design meets drinking water safety standards; low-noise operation suits occupied spaces; compact wafer/threaded types fit tight mechanical rooms.

Special Sanitary Applications: Deployed in biopharmaceutical, parenteral drug, food & beverage and high-purity water systems. Electropolished crevice-free design with tri-clamp connections meets strict hygiene requirements; CIP/SIP compatible for clean-in-place and sterilize-in-place cleaning.

Every Vertical And Horizontal Check Valve is manufactured and tested in compliance with API 598, ISO 5208 and ISO 9001 standards. All raw materials come with MTR EN 10204 3.1 material certificates. Each valve undergoes 1.5×rated shell hydrostatic test, 1.1×rated seat leak test and functional operation verification before shipment. 18-month warranty from shipment.

Q1: What is the difference between vertical and horizontal check valves, and how do I choose?

A: Vertical lift check valves have a guided piston disc moving vertically along the stem axis, delivering stable backflow prevention for vertical risers, and must be installed vertically. Horizontal swing check valves have a hinged disc with lower flow resistance, suitable for horizontal pipelines; spring-assisted versions can operate in any orientation. Select based on pipeline orientation, flow characteristics, media type and available space.

Q2: What is ANSI FCI 70-2 Class VI bubble-tight sealing?

A: Class VI is the tightest seat leakage class defined by FCI, meaning zero visible bubbles during underwater seat leak testing at 1.1× rated pressure for soft-seated valves. It provides essentially zero leakage, critical for gas, chemical, potable water and pharmaceutical applications where even minor backflow can cause contamination or safety hazards.

Q3: What material and seal options are available, and how do I select?

A: Body materials include WCB (general service), WC6/WC9 (high-temperature steam), SS304/SS316 (corrosive media) and low-temperature cryogenic grades. Seal options include PTFE (chemicals, ≤200℃), EPDM (water/steam, ≤150℃), FKM (oils, ≤200℃) and metal (high temperature >200℃). Select based on medium type, temperature and corrosion requirements; seal material is typically the temperature-limiting component.

Q4: What certifications apply, and which do I need for my target market?

A: Certifications include CE (EU PED), ISO 9001 (quality management), NSF/ANSI 61 & 372 (US/Canada potable water lead-free), API 598 (industrial valve testing). CE is mandatory for EU market; NSF 61/372 is required for US/Canada drinking water; CE + ISO + API 598 is standard for global industrial projects.

Q5: What connection types are available, and which should I use?

A: Connection types include flanged (general industrial, all sizes), wafer (large-diameter municipal, compact economical), threaded (small sizes, no welding), tube weld (high-pressure hazardous, permanent zero-leak) and tri-clamp (sanitary, quick-release). Select based on application type, pressure class, maintenance requirements and existing pipeline standards.

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