HomeProductsGate Cut-off SeriesVertical Check Valve

Vertical Check Valve


Automatic backflow prevention - Zero leakage sealing - Industrial grade durable
➤ Intelligent unidirectional control: the valve flap lifts along the vertical centerline, the medium automatically opens when the medium flows in the forward direction, and closes instantly when the reverse backflow occurs, preventing the medium from backfeeding and ensuring the safety of piping system.
➤ Super sealing performance: the sealing surface of the valve flap and valve seat adopts Stellite cobalt-based cemented carbide surfacing, which is wear-resistant, high-temperature-resistant (≤540 ℃), corrosion-resistant, and the service life is enhanced by more than 3 times.
➤ Full working condition adaptation: support horizontal/vertical installation, applicable temperature -196℃~+540℃, pressure range PN1.6~PN42.0 (Class150~2500), covering water, steam, oil, strong acid and other media.
➤ Global compliance certifications: ISO 9001, FDA (sanitary option), meet the stringent standards of petroleum, chemical and pharmaceutical industries.


1. Key Advantages


Zero water hammer design

Spring-assisted closing technology, low impact force when the valve is closed, effectively eliminating pipeline water hammer phenomenon, protecting the pump and precision equipment.


Ultra-low flow resistance optimization

Straight-through flow path design, flow resistance reduced by 40%, flow coefficient (Cv value) increased by 30%, energy saving and consumption reduction.


Lifetime maintenance-free

316L stainless steel stem + self-lubricating bushing, coefficient of friction <0.1, resistant to 5 million openings and closings, trouble-free operation for more than 10 years.


Flexible installation

Compact structure (length 30% shorter than traditional valves), 40% lighter weight, space and bracket cost savings, support for narrow space piping.


2. Technical Specifications


Parameters
Standard Configurations
Extended Options
Body Material
304/316 Stainless Steel (CF8/CF8M) 
316L (Medical Grade), WCB Carbon Steel
Sealing Material
Stellite Cobalt Cemented Carbide
 PTFE/Flexible Graphite (Low Temperature)
Nominal Diameter
DN15-DN200 (Standard) 
DN300 (customized) 
Pressure Rating
PN16 (1.6MPa)
PN42 (high-pressure type) 
Temperature Range
-29℃~+425℃ (standard)
-196℃~+540℃ (extreme conditions) 
Connection
Flange (GB/T9113)
Butt-welding/threading (ASME B16.25)
Certifications
 ISO 9001, RoHS 
FDA, 3-A (sanitary)


3. Industry Applications

Oil & Energy

- Backflow prevention for oil pipelines (Hydrogen sulfide corrosion resistant, PN40 high pressure design).

- Boiler steam system (temperature resistance 540 ℃, zero leakage to ensure safety).


Chemical and Pharmaceutical

- Strong acid media transportation (316L valve body resistant to nitric acid, acetic acid).

- GMP aseptic pipeline (mirror polishing Ra ≤ 0.8μm, no dead space design).


Water treatment and electric power

- Power station cooling water system (spring-assisted closure, waterproof hammer impact).

- Municipal water supply network (DN200 large caliber, low flow resistance and energy saving).


4. Customization Options

▸ Extreme working condition adaptation:

- Deep cold type: -196 ℃ liquid nitrogen environment (special sealing package).

- High temperature type: 540 ℃ steam conditions (alloy steel valve body).

▸ Intelligent upgrade:

- Valve position sensor (4-20mA signal output, interlock control).

- Explosion-proof certified actuator (Ex d IIC T6).

▸ Sanitary Certification:

- 3-A/FDA compliant polished, supports CIP/SIP cleaning.  


If you have any enquiry about quotation or cooperation,please feel free to email us at or use the following enquiry form. Our sales will contact you within 24 hours. Thank you for your interest in our products.

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