PQ340H, PQ340Y Valvola a sfera eccentrica a tenuta dura
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, piccole particelle solide, polpa, coal ash, and petroleum gas.
Nome del prodotto: Hard Seal Eccentric Ball Valve
Modello del prodotto: PQ340H, PQ340Y
Diametro nominale: DN15～DN2200
Struttura: Sferico
Pressione nominale: 1.6Mpa~32.0Mpa
Metodo di connessione: Flangia
Temperatura applicabile: -20ºC～+180ºC～350ºC～550ºC
Metodo di attuazione: Manuale, Worm Gear, Elettrico, Pneumatico
Materiale del corpo valvola: Acciaio al carbonio, Acciaio fuso, WCB, Acciaio inossidabile
Norma di produzione: GB (Standard nazionale cinese), DA (Norma tedesca), API (Norma americana), ANSI (Norma americana)
Supporti applicabili: Acqua, Olio, Slurry, Sewage, Gas, Liquido
Produttore: Zhejiang Kozo Valve Co., Ltd.
Caratteristiche strutturali
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. Perciò, 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, rendendolo particolarmente adatto per supporti contenenti fibre, piccole particelle solide, e liquami.
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
Progettazione e produzione: GB12237-89
Flange Connection: GB/T17241.6998, GB/T9115 (Steel)
Lunghezza strutturale: GB12221-89
Pressure Test: GB/T13927
Performance Parameters
Pressione nominale (MPa): 0.6 1.0 1.6 2.5 4.0
Diametro nominale (mm): 40-600 40-600 40-600 40-600 40-600
Sealing Test Pressure (MPa): 0.66 1.1 1.76 2.75 4.4
Shell Test Pressure (MPa): 0.9 1.5 2.4 3.75 6.0
Temperatura applicabile (°C): -29~300, -29～425, -29～540
Supporti applicabili: Clean water, seawater, liquami, acidi, alkalis, liquids, liquami, vapore, fuel gas, oils
Drive Method: Manuale, Elettrico, Pneumatico
Tipo di connessione: Collegamento a flangia, Wafer connection
Installation Method: Vertical installation, Horizontal installation
