PQ340F side-mounted eccentric half ball valve, side-mounted eccentric half ball valve,eccentric half ball valve,ball valve

The structure of the PQ340F side-mounted eccentric half ball valve adopts the eccentric - wedge-tight principle to achieve the purposes of locking, regulating and closing through the transmission mechanism. The sealing pair is a metal face ring band hard face contact seal. The double eccentric structure ensures that the valve core is located in the ball storage chamber when opening, with a large flow cross-section and the valve not being eroded. When closing, the valve core is not eroded. When opening, the valve core surface gradually advances along the valve seat. Effectively remove scaling obstacles to achieve reliable sealing. It is particularly effective for the mixed-flow transportation of two-phase mixed flow where solids prone to scaling precipitate. The second feature is that the hemispheres of the valve are made of bimetallic materials, and different alloys are surfacing welded on the base material. The valve seats are also surfacing welded accordingly and undergo special treatment. The sealing surfaces are combined into various types such as anti-corrosion, wear-resistant, and high-strength to meet the requirements of different occasions. The third feature is that the sealing is strictly prohibited, and zero leakage can be achieved when conveying harmful gases. The fourth feature is that the valve core of the sealing pair has a compensation allowance. When the valve seat is worn (the hardness of the valve seat is lower than that of the valve core), it can still be reliably sealed by turning it slightly when closed, thus extending its service life. In addition, users can unscrew the compression nut, adjust or replace it, and the valve seat can still be used, avoiding the drawback of many current valves being scrapped due to sealing failure.

Therefore, the selection and matching of bimetallic sealing pairs made of different alloys (or combined balls) by surfacing can be applied to various industrial sectors that require wear resistance, corrosion resistance, temperature regulation resistance, and strict sealing.

Product features of PQ340F side-mounted eccentric half ball valve:

1. Large flow area and low flow resistance. This is because after opening, the valve core is located in the spherical chamber, and the fluid flows directly through.

2. The operating torque is small. It can be opened and closed by turning 90 degrees, and the operation is convenient.

3. Tight seal, double eccentric metal hard seal. Scaling does not affect the opening and closing, which is a more significant advantage of the semi-ball valve

4. Long service life, the sealing pair is wear-resistant and has compensation capacity, and the valve seat can be adjusted or replaced.

The main applications and product features of the PQ340F side-mounted eccentric half ball valve:

General-purpose valves: Specifications and models PN1.0-4.0Mpa, DN40-1600. It is suitable for occasions with strict requirements such as sewage treatment, pulp, and urban heating and heat supply.

2. Specialized valves for oil and chemical industry: Specifications: DN40-1600, PN1.0-4.0Mpa. Suitable for various oil products such as crude oil and heavy oil, as well as weakly corrosive and two-phase mixed-flow media in the chemical industry. The temperature resistance can reach up to 425℃.

3. Gas-specific valves: Specifications DN40-1600, PN1.0-4.0Mpa, suitable for the control of gas, natural gas and liquefied gas transportation. The structural feature of the product is that it is sealed and surfacing with different chromium-containing stainless steels, ensuring a tight seal and corrosion resistance.

4. Slurry dedicated valve: Specification DN40-1600, suitable for industrial pipeline transportation in liquid and solid two-phase mixed flow or liquid transportation where chemical reactions result in crystallization or scaling. The structural features of the product vary according to the customer's requirements for the medium and temperature. The valve core of the sealing pair is surfacing with chromium-molybdenum-vanadium alloy, and the valve seat is surfacing with chromium-molybdenum alloy, chromium alloy or stainless steel alloy electrodes to meet the needs of different slurry transportation.

5. Special valve for pulverized coal ash and slag: Specification DN40-1600, suitable for control in power plants, hydraulic slag removal or gaseous conveying pipelines. The product is required to have wear resistance. The valve core adopts a combined ball bimetallic type, which has considerable rigidity and is extremely wear-resistant. The valve seat is made of integral wear-resistant No. 1 or fully surfacing welded, and it also has the advantages of hard-sealed ball valves.

Packing of Standard Packing: 

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 470 gallon liquid totes Special package is available on request. E FORUs’  is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition