PQ340H, PQ340Y Hard Seal Eccentric Ball Valve

The PQ340H/Y hard-seal eccentric ball valve utilizes an eccentric valve body, eccentric ball, and valve seat. As the valve stem rotates, it automatically centers itself along a common trajectory, tightening further during closing to achieve a perfect seal. The ball and seat are completely separated, eliminating wear on the sealing ring and overcoming the problem of constant wear between the sealing surface and the ball in traditional ball valves. Non-metallic elastic material is embedded in the metal seat, providing excellent protection for the seat’s metal surface. This product is particularly suitable for media in the steel industry, aluminum industry, fiber, small solid particles, pulp, coal ash, and petroleum gas.

Product Name: Hard Seal Eccentric Ball Valve

Product Model: PQ340H, PQ340Y
Nominal Diameter: DN15～DN2200
Structure: Spherical

Nominal Pressure: 1.6Mpa～32.0Mpa
Connection Method: Flange

Applicable Temperature: -20ºC～+180ºC～350ºC～550ºC
Actuation Method: Manual, Worm Gear, Electric, Pneumatic

Valve Body Material: Carbon Steel, Cast Steel, WCB, Stainless Steel
Manufacturing Standard: GB (Chinese National Standard), DIN (German Standard), API (American Standard), ANSI (American Standard)

Applicable Media: Water, Oil, Slurry, Sewage, Gas, Liquid
Manufacturer: Zhejiang Kozo Valve Co., Ltd.

Structural Features

1. The valve seat features an external step that mates with the internal step of the valve body, preventing the ball from jamming or disengaging from the seat.

2. Utilizing an eccentric valve body, eccentric ball, and valve seat, the valve stem automatically centers itself along a common trajectory during rotation. During closing, the valve tightens further, achieving a perfect seal. Therefore, the eccentric hemispherical valve offers reliable and safe sealing performance. During valve opening and closing, the ball completely disengages from the seat, eliminating wear on the sealing surface and overcoming the problem of constant wear between the valve seat and ball sealing surfaces in traditional ball valves.

3. Non-metallic elastic material is incorporated into the metal seat, providing excellent protection for the metal sealing surface.

4. The hemispherical design creates a shearing effect between the ball and seat, making it particularly suitable for media containing fibers, small solid particles, and slurries.

5. When fully open, it offers high flow capacity, low pressure loss, and prevents media from accumulating in the valve body cavity.

6. This product has precise adjustment and reliable positioning functions, the flow characteristics are approximately percentage, the adjustable range is large, and the maximum adjustment ratio is 100:1.

Execution Standards
Design and Manufacturing: GB12237-89
Flange Connection: GB/T17241.6998, GB/T9115 (Steel)
Structural Length: GB12221-89
Pressure Test: GB/T13927