Where to Install Pool Check Valve: A Full Poll Valve Guide
In swimming pool water treatment systems, check valves serve as core components to ensure the stable operation of circulation systems. Their installation positions and performance directly impact equipment lifespan and water quality safety. With years of in-depth research in fluid control, TIANYU has launched professional pool check valves that have become industry benchmark products due to their specialized design, reliable performance, and customized services.
Where to Install Pool Check Valve
I. Core Technical Analysis of Pool Check Valve
TIANYU pool check valves adopt a unique swing-type structure. Compared with lift check valves, the disc rotates around the shaft to open under the action of water flow, reducing the flow resistance coefficient by 30% and effectively minimizing energy consumption in the circulation system. The disc and seat are processed with precision grinding technology, with a sealing surface roughness of Ra≤0.8μm. Combined with an EPDM rubber sealing ring, they achieve bidirectional zero leakage, ensuring effective prevention of backflow even under a micro-pressure condition of 0.05MPa.
The valve body is made of specially proportioned 304L stainless steel with a carbon content controlled below 0.03%. Together with solution treatment, this enhances intergranular corrosion resistance by 40% in chlorinated water environments. The valve shaft is made of high-strength 2Cr13 stainless steel, which is nitrided to achieve a surface hardness of HV700, significantly improving wear resistance and withstanding over 100,000 opening/closing cycles.
Where to Install Pool Check Valve
II. Performance and Selection Strategies for Different Installation Positions
1. Installation at Pump Outlet
When installed at the pump outlet, TIANYU check valves can effectively prevent water hammer effects during pump shutdown due to their fast closing characteristics (closing time <0.8 seconds). The built-in buffer spring design in the disc can absorb 60% of the water hammer pressure peak, protecting the pump impeller and pipeline system. In a large swimming pool project, after installing TIANYU check valves, pipeline vibration frequency decreased by 75%, and equipment failure rate dropped by 80%.
2. Installation Before and After Filters
Installing the check valve at the front of the filter prevents backflow from contaminating raw water during backwashing, while installation at the rear avoids filter media loss. The streamlined flow path design of TIANYU check valves reduces filter operating resistance by 15%, extending the service life of filter media. Its unique self-cleaning structure automatically removes impurities adhering to the disc, reducing maintenance frequency.
3. Installation at Inlet and Outlet of Heating Equipment
For the special working conditions of heating equipment, TIANYU offers high-temperature resistant check valves that can withstand up to 80℃. The double-layer sealing structure, with an inner layer of high-temperature resistant fluororubber and an outer layer of graphite wound gasket, ensures good sealing performance even under sudden temperature changes, preventing equipment damage caused by hot water backflow.
Where to Install Pool Check Valve
III. Manufacturing Processes and Quality Control System
1. Precision Casting Technology
The valve body uses investment casting technology, achieving a dimensional accuracy of CT6 and a surface roughness of Ra≤12.5μm. Through computer simulation of the mold filling process, the design of gates and risers is optimized to eliminate casting defects such as shrinkage cavities and pores. Key components are inspected by ultrasonic testing to ensure internal quality complies with GB/T 5677-2013 standards.
2. CNC Machining Technology
A five-axis machining center is used to grind the seat sealing surface, with flatness error controlled within 0.002mm. The disc and shaft adopt an interference fit process, with the fit clearance controlled at 0.01-0.02mm to ensure operational stability. All threaded connections are treated with anti-loosening measures, using thread locking adhesive combined with double nut structures to prevent loosening due to vibration.
3. Full-Process Quality Inspection
A three-level quality inspection system is established: raw materials undergo spectral analysis and mechanical property testing upon arrival; semi-finished products are inspected for dimensional accuracy and surface quality; finished products must pass a 1.5x nominal pressure (1.5MPa) hydrostatic strength test (holding pressure for 30 minutes), a 1.1x nominal pressure airtight test (leakage rate <1×10⁻⁶m³/h), and a 5,000-cycle opening/closing life test to ensure 100% product qualification rate.
How to Identify Pool Valves and Plumbing Lines
Pool plumbing is a technical process, but it’s actually doable. One of the things that you need to do is to identify the valves and essential components of a pool plumbing system. Once you can learn these things, maintaining your pool is a lot easier.
How do you read pool valves?
Step 1
Pool and spa plumbing diagram
Go to your pool and look for specific features that either put or pull water. These components could either be main drains, skimmers, deck jets, and vacuum ports.
Step 2
In ground spa plumbing diagram
It’s essential that you understand how water flow works. In this way, you will be able to identify specific plumbing lines. For instance, the suction lines are responsible for water intake, so it’s on the pump. Meanwhile, return lines deliver water from the pump.
Step 3
Suction line and return line diagram
Turn the valves of the water intake side so that only a single line can pull water.
Step 4
Above ground pool plumbing diagram
Go to the pool and probe various suction ports, such as main drains, vac lines, and skimmers.
Step 5
Label the isolated suction line that you were able to identify. Repeat this procedure until such time you can determine all the lines on the suction part of your pool’s plumbing system.
IV. Product Application Advantages and Typical Cases
1. Energy Saving and Efficiency Improvement
The low flow resistance design of TIANYU check valves reduces circulation system energy consumption by 12%-18%. In a community swimming pool project, this resulted in an annual electricity cost saving of approximately 12,000 RMB, significantly reducing operating costs.
2. Long Life and Maintenance-Free
Through material optimization and structural innovation, the valve service life can reach more than 10 years. After 8 consecutive years of use in a water park, the sealing performance remained good upon inspection, requiring no replacement of core components.
3. Fast Response Characteristics
The fast closing function of the disc can cut off water flow in an instant (<0.5 seconds) during a power outage, effectively protecting equipment safety. In multiple swimming pool projects, it has successfully prevented equipment damage accidents caused by power outages.
Where to Install Pool Check Valve
V. TIANYU Brand Customization Service Advantages
Relying on a strong R&D team and intelligent manufacturing platform, TIANYU provides comprehensive customization services for customers:
1. In-Depth Technical Customization
We can customize products with special pressure ratings (up to PN25) and extra-large diameters (DN200) according to project requirements, provide solutions for special materials (such as Hastelloy) and special temperatures (-20℃ low-temperature type), and optimize product performance through CFD fluid simulation analysis.
2. Efficient Delivery System
We maintain standardized product inventory, with regular orders shipped within 3 working days; for customized products, we use a concurrent engineering model where design, production, and inspection proceed simultaneously, shortening the delivery cycle by 40% compared to the industry average.
3. Full Cycle Service Guarantee
We provide one-stop services from project design consultation and installation guidance to after-sales maintenance. Equipped with a professional technical team, we respond to customer needs 24/7, offering remote diagnosis, on-site maintenance, and other services. We have established a product full-life cycle management system, realizing real-time monitoring of valve operating status through IoT technology to predict potential failures in advance.
TIANYU always adheres to a customer needs-oriented approach. With deep technical accumulation, advanced manufacturing processes, and a complete service system, we have established an industry benchmark in the field of pool check valves. Whether for small private pools or large commercial projects, TIANYU can provide the most suitable solutions. With excellent product performance and professional service quality, we create long-term value for customers and help build safe, efficient, and reliable swimming pool water treatment systems.
