Single clip to clip ultra-thin steel lined fluoropolymer check valve

H74F46 single disc wafer-type fluoropolymer-lined check valve

H74F46 is a single disc swing check valve with a short valve body connection structure, installed between two matching pipe flanges. The valve disc opens under the positive flow of the medium and moves towards the closed position when the flow rate decreases or a reverse pressure difference occurs, in order to limit the backflow of the medium in the pipeline. The valve body material of this product includes WCB cast steel and 304 stainless steel solutions. The lining material can be checked according to the configuration of PFA or FEP (F46).

What are the characteristics of the single petal swing structure?

Single disc swing check valve can be opened and closed by rotating the valve disc around the support part, without the need for an external actuator. The actual opening angle, closing speed, allowable installation direction, and leakage performance of the valve disc depend on the weight of the valve disc, supporting structure, sealing pair, and operating conditions. Whether to use spring assisted closing must be based on the product structure diagram of the corresponding specifications, and it cannot be assumed that all H74F46 are equipped with springs.

How to install clip on connections?

The wafer-type valve body is installed between two paired flanges, and it is necessary to verify the flange pressure rating, sealing surface, bolt arrangement, gasket structure, and positioning of the valve body in the pipeline. Short structures are beneficial for controlling installation space, but cannot directly derive a unified structural length ratio. During installation, it is also necessary to confirm the flow direction markings of the valve body and avoid adjacent pipe fittings obstructing the normal opening of the valve disc.

How to choose the valve body and lining for WCB and 304?

WCB cast steel and 304 stainless steel are different valve body material options, and should be selected based on external environment, structural requirements, and ordering standards. PFA and FEP (F46) belong to different fluorinated polymer lining materials, which are mainly determined based on the compatibility of the medium and the actual lining structure. The valve body material, lining material, valve disc, pin shaft, sealing pair and other liquid receiving components should be checked separately, and it cannot be determined solely based on the word "fluorine lining" that all liquid receiving parts use the same material.

Main selection parameters of H74F46

When placing an order, the specific valve body size, matching flange, and structural diagram should be checked, and the actual valve disc opening space should be confirmed. The configuration of lining and valve internals should be adapted to the medium, temperature, and working pressure difference, and series parameters cannot replace specific specifications of supply drawings.

How to select and maintain pipelines containing corrosive media?

The name, concentration, temperature, and working pressure of the medium should be provided DN、 Paired flange standard, allowable installation direction, normal flow rate, and flow fluctuation situation. If the medium contains particles or is prone to sedimentation, the risk of valve disc rotation and sealing surface wear should also be evaluated. During maintenance and inspection, isolation and pressure relief must be carried out first, with a focus on checking the valve disc support, sealing pair, lining integrity, and foreign matter deposition. It is not allowed to add springs or change the valve disc action mode without confirming the structure.

Common problems with H74F46 single disc clamp check valve

What is the difference between H74F46 and double disc clamp check valve?

H74F46 adopts a single disc swing structure in this product, while the double disc clamp check valve adopts different valve disc arrangements. The opening motion, installation direction, and closing behavior of the two need to be determined according to their respective structural diagrams, and cannot be replaced by similar appearances alone.

Can H74F46 be directly installed in vertical pipelines?

It is necessary to verify the installation posture and medium flow direction allowed by this specification. The gravity effect, support position, and closing mechanism of a single valve disc can affect installation conditions and cannot be assumed to be applicable in any direction.

Can PFA or FEP lining ensure zero leakage under strong acid conditions?

We cannot make such a unified guarantee. The compatibility of lining materials and the leakage performance of valve closure are different technical requirements, and the medium concentration, temperature, pressure difference, lining structure, and applicable valve inspection requirements should be checked separately.