A trunnion-mounted ball valve supports the ball at its rotational axis rather than allowing line pressure to move it against a downstream seat. This arrangement is often considered for larger pipeline valves and duties where operating torque deserves particular attention.
Farpro’s cast steel range includes the Q347F and Q47Ni models below. Their product pages show the available construction and dimensions, making it easier to compare options for a new installation or an existing line.
Trunnion-Mounted Ball Valve Range

Q347F Trunnion-Mounted Ball Valve – Baja Tuang
The Q347F is a cast steel trunnion-mounted ball valve with gear operation. The ball is supported at its rotational axis,

Baja Cor Katup Bola Terpasang Trunnion – Q47Ni
Farpro Valve menawarkan serangkaian katup bola yang dipasang di trunnion yang terbuat dari baja tuang. Katup ini dirancang
A Supported Ball, a Different Seat Arrangement
With the ball held in position, the seats provide the sealing contact around it. Supporting the ball changes the loads acting through the valve and can help manage operating torque as valve size and pressure increase.
That does not mean every trunnion valve has the same seats, bore or pressure rating. The model’s materials and construction remain important, particularly where temperature, corrosion or frequent operation influence the choice.
Itu Q347F cast steel model uses gear operation for manual isolation. If you are comparing it with a katup bola mengambang, start with the line conditions and how the valve will be operated, then compare the individual specifications.
Tentang Produsen Katup Farpro
Farpro Valve adalah produsen katup global besar yang terlibat dalam penelitian, perkembangan, produksi dan penjualan katup.
Standar produk kami meliputi: GB/JB, API, ANSI, AWWA, DARI, DIA, gost, tidak, dll..
Katup kami tersedia di 12 kategori utama, 200 seri dan 4000 ukuran, termasuk katup gerbang, katup globe, katup bola, Katup kupu-kupu, katup periksa, katup diafragma, katup pengurang tekanan, katup sumbat, perangkap, dll..
Output tahunan mencapai 80,000 ton. Semua produk banyak digunakan dalam minyak bumi, petrokimia, bahan kimia, tenaga listrik, metalurgi, pemeliharaan air, konstruksi, farmasi, drainase dan bidang lainnya.
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