I. Description

The H61H/Y type socket-weld forged steel check valve plays a vital role in pipeline systems. In its model notation, “H” signifies that it belongs to the check valve category. The digit “6” represents the socket-weld connection technique, which involves inserting the pipe into the valve’s socket and then welding it, creating a robust and leak-tight joint. “1” indicates a straight-through configuration, ensuring a relatively unobstructed pathway for the medium to flow. The appended “H” and “Y” specify distinct sealing surface materials. “H” generally denotes a stainless steel sealing surface, which offers commendable corrosion resistance and is suitable for numerous routine operating conditions. “Y,” on the other hand, typically stands for a hard alloy sealing surface, providing enhanced durability and wear resistance, especially in demanding environments with abrasive or corrosive substances. The valve body is fabricated from forged steel. The forging process imparts a compact internal structure to the steel, granting it high strength and toughness. Consequently, the valve can withstand elevated pressures, high temperatures, and, to a certain degree, corrosive media.

II. Parameters

1. Nominal Pressure: Typically available within a spectrum ranging from 1.6MPa to 10.0MPa or potentially even higher, contingent upon particular design and manufacturing stipulations. This versatility permits the valve’s deployment in diverse pressure-rated pipeline infrastructures.

2. Nominal Size: Spans from DN15 to DN50, which constitute standard metric dimensions. These sizes are meticulously chosen to correspond with assorted pipe diameters in industrial and commercial piping assemblies.

3. Applicable Temperature Range: Ordinarily, it can function within a temperature interval of -29°C to 425°C. Nevertheless, when specialized sealing materials are employed or for valves engineered for extreme circumstances, this range can be modified accordingly.

4. Sealing Performance: Engineered to attain an elevated level of sealing efficacy. Thanks to precise machining and top-notch sealing materials, the leakage rate under normal operational circumstances is exceedingly low, fulfilling the exacting demands of most pipeline systems.

III. Function and Applications

1. Function: The cardinal function of this check valve is to preclude the backflow of the medium within the pipeline. When the medium courses in the normal direction, the pressure exerted by the medium prompts the valve disc to open, facilitating smooth transit. Should any reverse flow propensity emerge, the valve disc will promptly shut under the combined influence of its own weight and the reverse pressure of the medium, efficaciously obstructing the backflow and buttressing the stability and safety of the pipeline system.

2. Applications: It enjoys extensive utilization across a plethora of industries. In the petrochemical realm, it is enlisted to govern the flow of diverse hydrocarbons, ensuring that fluids travel in the appropriate direction during refining, transportation, and storage operations. In the power generation domain, it is incorporated into steam and water pipelines to avert reverse flow that could inflict damage on equipment or disrupt operations. In the chemical industry, rife with corrosive agents, the H61H/Y type valve, particularly with its corrosion-resistant sealing alternatives, assumes a pivotal part in upholding the integrity of the piping network. Additionally, it is also widely employed in heating, ventilation, and air conditioning (HVAC) systems, as well as in general industrial piping where dependable flow control and backflow prevention are indispensable.