H44H-16C

The main features of the H44H-16C valve are as follows:

I. ‌ Structure and Working principle ‌

Swing type ‌ : The disc is opened and closed by rotating around a fixed axis with a rocker arm. When the fluid pushes the disc

 to open in the forward direction, it closes automatically by its own weight and the pressure of the medium in the reverse direction. 

It is an automatic valve.

Flanged connection (represented by model "44") ‌ : with flanged interface, installed firmly and sealed reliably.

Full inside structure ‌ : All opening and closing parts are sealed inside the valve body, no leakage point, only the middle flange needs gasket.

2. Youdaoplaceholder0 Material and sealing performance ‌

Valve body material ‌ : The suffix "C" indicates carbon steel (WCB), high mechanical strength.

Sealing surface treatment ‌ :

"H" indicates that the sealing surfaces of the disc and seat are made of stainless steel by surfacing welding (such as 1Cr18Ni9Ti) or other hard alloys.

Wear-resistant and corrosion-resistant, suitable for water, oil products, steam and acidic media (such as nitric acid, acetic acid).

Spherical connection structure ‌ : The disc and rocker arm are connected by a spherical connection for micro-position compensation and enhanced 

sealing adaptability.

Iii. Youdaoplaceholder0 Performance parameters ‌

Pressure rating ‌ :

Nominal pressure ‌PN16‌ (about 1.6MPa).

Strength test pressure ‌2.4MPa‌, sealing test pressure ‌1.8MPa‌.

The < table > < tr > < th > nominal pressure (MPa) < / th > < th > strength test (MPa) < / th > < th > sealing test (MPa) < / th > < / tr > < tr > 

< td > 1.6 < / td > < td > 2.4 < / td > < td > 1.8 < / td > < / tr > < / table >

Temperature range ‌ :

Carbon steel valve body (WCB) ‌ : -29℃ to 425℃.

Stainless steel valve body ‌ : -40℃ to 550℃ (e.g. CF8/CF8M).

Iv. Youdaoplaceholder0 Fluid Characteristics and Application scenarios ‌

Low flow resistance design ‌ : Streamlined flow path with less fluid resistance than lift check valve, suitable for high-flow pipes.

Backflow protection ‌ : Specifically designed to prevent medium backflow, pump reverse flow and container discharge, to ensure system safety.

Applicable fields ‌ :

Petroleum, chemical, pharmaceutical, power (boiler steam), metallurgy and other industries.

Caliber range: ‌DN15 - DN800‌ (up to DN1200 in some manufacturers).

V. ‌ Special design considerations ‌

Closing shock problem ‌ : The rapid closing of the disc can cause water hammer, and some designs mitigate shock with damping devices or metal 

valve seats.

Low pressure sealing limit ‌ : Lower sealing performance under low pressure conditions than lift check valve can be optimized by auxiliary spring or

 weight hammer structure.

Vi. Youdaoplaceholder0 Installation and maintenance ‌

Installation direction requirement ‌ : The fluid inlet direction should be aligned with the rotating side of the disc to ensure normal opening and closing.

Maintenance convenience ‌ : Compact structure, no need for external drive unit, reduced maintenance complexity.