Dual disc check valves are commonly installed in applications that backflow would cause an issue. However, since they are non return valves, they are a cheap, effective, and easy solution to solve a potential issue.
All place install check valve while Pipe have control valve or pump. If fluid have to back upstream after it.
Under some situation which need to stop returning also backflow, at this point it can backflow through the bypass which on check valve, to regulating too much flow in a pipeline by backflow. E.g. Pool on roof.
Body with full rubber lined can effectively reduce disc's leakage probability for the corrosion of seawater. In addition, body can choose CI or DI material to decrease cost.
Back-up Line for Uses Such as Replacement of Equipment.

Features

• By pass check valve can be fluid control and decompression,Especially if replacing an existing valve to avoid pipe modifications.
• Bypass check valve can be used as a regulator when replacing equipment.
• Bypass check valve increases safety and saves money with handwheel than the electric operator.
• Retail acceptable.
• Beautifully packaged.
• Customized special valve.

Dual Plate Check Valve Installation Guide:

When installing a check valve, it can be used in both indoor and outdoor environments. However, if the medium is corrosive or the surroundings are prone to rust, it is essential to select a valve material combination that matches the conditions to ensure durability and safety. For special operating conditions, it is recommended to consult TVCCL’s technical team for professional advice.
Before installation, all debris, oxidation scale, and solid impurities inside the pipeline should be thoroughly removed to prevent interference with the valve’s operation. During installation, the flow direction of the medium must align with the arrow marked on the valve body. The piping should be aligned at the front and rear centers, with flange interfaces kept parallel and bolts evenly tightened. Special attention should be paid to the distance between the check valve and the pump, which should be six to eight times the valve size to ensure stable system performance.
For routine maintenance, regular inspections should be conducted to check for leakage, abnormal noise, or vibration. In addition, the valve should be periodically examined for signs of corrosion, jamming, or other irregularities. Necessary cleaning, dust removal, and residue treatment should be performed to maintain proper equipment operation and extend its service life.

Specification

• Size: 2" ~ 24" (DN50 - DN1500)
• Pressure Rating For ASME: 125# ~ 150# Suit For ASME / MSS / API Flange
• Pressure Rating For JIS: 10K Suit For JIS Flange
• Material:CI,DI
• Designed in accordance with API 594
• (Other flange connection please contact Taiwan Valves Centre Co., Ltd.)
• *Technical information is only for reference. Taiwan Valves Centre Co., Ltd. reserves the right to change without previous notice.

PRESSURE - TEMPERATURE RATING

The pressure-temperature rating table is an essential technical reference in the design and selection of industrial valves. It indicates the maximum allowable working pressure that a valve made from a specific material can withstand at various temperatures. According to the ASME B16.34 standard, this table is based on the mechanical properties and allowable stress of materials, listing pressure limits for different pressure classes (such as Class 150, 300, 600, etc.) at designated temperatures. These values are calculated by considering the reduction in material strength at elevated temperatures, ensuring that valves do not fail due to overpressure or overheating under actual operating conditions. When selecting a valve, users must first determine the operating temperature and then consult the table to verify whether the corresponding pressure class can safely handle the system pressure. The table also categorizes materials into groups—such as carbon steel, stainless steel, and alloy steel—since each material behaves differently under high temperatures, and the allowable pressures vary accordingly. In summary, the pressure-temperature rating table is a fundamental tool for ensuring valve safety. For engineers, it serves not only as a design reference but also as a critical component of risk management.

Applications

• By pass check valve is suitable for waterworks.
• If the fluid passing through the check valve need to returned to upstream, a bypass check valve will be a good choice.
• The bypass valve can prevent oil from entering the fuel system, guarantee the normal lubrication of the entire engine.
• Bypass check valve is also used in central heating systems to ensure that the heat sink is not over pressured or emptied
• Check valves are available for applications with control valves or pumps. e.g. check valve or BY pass check valve.
• Bypass valves are basically there to vent pressure, it can be substituted for slow closure type valve.

Files Download

TVCCL Valves Catalogue

Catalogue for TVCCL valves

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Dual Plate Wafer Style Check Valve Installation and Maintenance Instructions

Installation and Maintenance Instructions for dual plate check valve

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FAQ

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