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HV-CV-IL-18-08N
CISSOKO
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Hydraulic Inline Check Valve, 1/2″ NPT. Check valves allow free flow in one direction and is blocks the flow in the reverse direction, used to keep a hydraulic system pressurised.
Features and Benefits
One-Way Flow Management: Allows unrestricted free fluid flow in one direction while instantly blocking reverse flow, ensuring the hydraulic system maintains consistent pressure retention.
Leak-Free Isolation: Engineered with a precision guided poppet mechanism that creates a positive mechanical seal to ensure zero reverse fluid leakage.
Rugged Steel Construction: Built with a high-strength zinc-plated steel body and hardened, ground steel internal components to provide maximum durability in severe operating conditions.
Secure Threaded Connections: Precision-machined 1/2" tapered pipe thread ports ensure a high-flow pathway and a secure, tightly sealed fitment with matching pipes or fittings to handle heavy pressure cycles.
Flow | 18 GPM | Max Pressure | 5000 PSI |
Working Ports | 1/2" NPT | Brand | Hydro-Pack |
Weight | 0.7 LBs | GTIN | 850081310600 |
Applications
Ideal for: High-Flow Industrial Hydraulic Systems, Pump Discharge Line Protection, Multi-Cylinder Pressure Maintenance, Power Unit Safety Backflow Prevention, and Agricultural Machinery Fluid Circuits.
Valves are typically packaged securely to prevent damage during transit. The packaging includes:
Protective Wrapping: To safeguard the valve from environmental damage and moisture.
Custom Crates / Heavy-Duty Cartons: For larger, heavier valves or multi-item units, ensuring safe handling.
Documentation: Includes installation guides, maintenance instructions, and warranty details. Delivery time depends on the model, customizations, and location but typically ranges from 2 to 6 weeks from the order date.
1. What is the main function of a hydraulic inline check valve in a circuit?
A hydraulic inline check valve is a directional control safety device designed to allow fluid to flow freely in one direction while completely blocking it in the reverse direction. It is commonly used to protect sensitive components from sudden reverse backflow pressure spikes, prevent fluid draining from high lines, and maintain localized system pressure when a pump is turned off.
2. What do the "1/2 inch" and "NPT" thread specifications mean for this valve?
The "1/2 inch" designation represents a standardized nominal pipe sizing system that provides a robust, high-flow oil pathway compared to smaller 1/4" or 3/8" models, but it does not equal the physical outer thread diameter. The "NPT" specification describes tapered pipe threads that form a reliable mechanical interference seal during assembly, which requires the application of thread sealant or Teflon tape to ensure a 100% leak-proof connection.
3. What is "cracking pressure" and why is it important for this 1/2" check valve?
Cracking pressure is the minimum amount of upstream fluid pressure required to push against the internal spring and lift the guided poppet off its seat to allow fluid flow to begin. For standard inline check valves, this rating is typically low (such as 5 PSI, 15 PSI, or 30 PSI) to minimize flow restriction, so it is vital to choose a cracking pressure that matches your pump and circuit requirements.
4. Can this inline check valve achieve a 100% leak-free seal in the blocked direction?
Yes, because it is engineered with a precision-guided metal poppet mechanism rather than a shifting spool. When reverse flow or pressure pushes against the poppet, it is driven tightly into a matching hardened steel seat, creating a positive mechanical seal that ensures zero reverse fluid leakage under standard hydraulic operating conditions.
5. What causes a hydraulic check valve to fail or leak in the reverse direction?
The most common cause of reverse leakage or malfunction is fine particulate contamination within the hydraulic oil. If dirt, metal filings, or debris get trapped between the hardened steel poppet and its seat, the valve cannot close completely, causing oil to slip past; additionally, extreme pressure spikes beyond the valve's rating can distort the spring or seat, preventing proper sealing alignment.
Yes, we support OEM and customization, including nameplate, packaging, and specific performance requirements. Send us your drawings or specifications for evaluation.
Valves are manufactured in compliance with international standards, ensuring high performance and reliability:
ISO 9001: Certified for quality management systems.
CE Certification: Ensures compliance with European safety, health, and environmental protection standards.
RoHS Compliance: Ensures the component does not contain hazardous materials.
Factory Testing: Every valve is rigorously tested for performance, pressure, and leak integrity before shipping.
1.What's our advantages?
Factory established in 2005;
With a great deal of production experience;
80+ employees become the professional team;
Constant updated ERP system ensure efficiency of work;
Sophisticated equipment ehanced the accuracy of products;
Professional salesmen provide the greast service;
With a large number of famous customers all over the world;
Great after-sales service;
With the long term cooperation with famous logistics and express company in China,provide the better goods service.
Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.
Of course we can. Just send me your logo we can make it for you.
America(40.5%):USA, Canada, Argentina, Brazil
Europe(30.8%):Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.
Asia(23.5%):Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.
Others(5.8%).
The Cissoko hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components. These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications, from heavy equipment and machinery to automotive and industrial systems.
The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.
Cissoko Hydraulic's manufacturing facilities for hydraulic pumps maintain stringent quality standards, often adhering to international certifications, to meet the expectations of customers in industries such as construction, agriculture, automotive, and manufacturing.
All hydraulic pumps produced by Cissoko Hydraulic have undergone compliance testing, ensuring their quality and reliability.
To meet the diverse needs of different industries, the Cissoko hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.
Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.
