Keterangan
Quarter-turn stainless steel isolation valve
Katup Bola Apung Stainless Steel
A compact full-port or reduced-port isolation valve for chemical, air, utility and general process service, configured to the specified material, kelas tekanan, seat and end connection.
What is a stainless steel floating ball valve?
A floating ball valve uses a ball supported by the two seats rather than fixed trunnions. When the valve closes, line pressure moves the ball slightly toward the downstream seat, creating a pressure-assisted seal. The compact arrangement is widely used for small and medium line sizes where fast quarter-turn isolation is required.
Stainless steel body grades provide a clean corrosion-resistant pressure boundary, but the final service capability also depends on the ball and stem material, seat polymer or metal seat, sedang mengemas, lari, pressure class and temperature. Each quotation should therefore define the complete valve configuration rather than body material alone.
Floating ball valve specifications
| Produk | Stainless steel floating ball valve |
|---|---|
| Body construction | One-piece, two-piece or three-piece design as ordered |
| Membosankan | Full bore or reduced bore |
| Bahan tubuh | ASTM A351 CF8/CF8M/CF3/CF3M; dupleks atau paduan nikel berdasarkan spesifikasi |
| Ball and stem | Stainless steel or service-specific alloy with required surface finish/coating |
| Seat options | PTFE, reinforced PTFE, PEEK or engineered metal seat subject to duty |
| Peringkat tekanan | Peringkat Kelas ASME atau PN diverifikasi berdasarkan material dan suhu |
| Akhiri koneksi | Federasi Rusia, RTJ, berulir, socket-weld or butt-weld according to valve design |
| Operasi | Tuas, gear operator, pneumatic actuator or electric actuator |
| Fitur opsional | Anti-static device, batang yang tahan ledakan, locking device, cavity relief and fire-safe design when specified |
| Dokumentasi | Catatan materi, laporan uji tekanan, GA drawing and additional inspection as ordered |
Tabel ini menjelaskan opsi pasokan rekayasa yang umum, bukan kisaran stok universal. Ukuran akhir, peringkat tekanan-suhu, memangkas, kursi, operator dan koneksi akhir harus dikonfirmasi terhadap spesifikasi pembelian dan edisi kode yang berlaku.
Pilihan bahan stainless steel dan paduan
| Keluarga materi | Penunjukan pemeran umum | Dasar seleksi yang khas |
|---|---|---|
| Baja tahan karat austenitik | ASTM A351 CF8, CF8M, CF3 dan CF3M | Ketahanan korosi secara umum; CF8M/CF3M menambahkan molibdenum untuk meningkatkan ketahanan terhadap klorida. |
| Baja tahan karat dupleks | ASTM A995/A890 4A dan terkait 2205 nilai | Kekuatan yang lebih tinggi dan ketahanan korosi tegangan klorida yang lebih baik bila ditentukan dengan benar. |
| Baja tahan karat super dupleks | ASTM A995/A890 5A atau 6A | Air laut, layanan lepas pantai dan klorida tinggi tunduk pada kontrol suhu dan fabrikasi. |
| Paduan nikel | ASTM A494 nilai yang cocok dengan C276, Paduan 20, Monel atau kimia terurut lainnya | Dipilih dari proses kimia yang sebenarnya, konsentrasi, data suhu dan kontaminasi. |
Desain, pengujian dan kepatuhan proyek
API 608 / ISO 17292
Common design bases for metal ball valves used in industrial piping. The exact edition and applicable scope must be stated.
ASME B16.34
Memberikan tekanan-suhu, desain, bahan, penyelidikan, testing and marking requirements for valves within its scope.
API 598
Common inspection and pressure-testing basis for shell and closure tests when specified.
API 607 / API 6FA
Fire-test qualification is configuration-specific and must be supported for the exact offered valve design.
Standar diberikan hanya bila dinyatakan dalam kutipan dan pesanan pembelian. Aman dari kebakaran, emisi buronan, layanan asam, Persyaratan kriogenik dan PED memerlukan desain yang pasti dan kualifikasi atau dokumentasi pendukung.
Aplikasi yang umum
| Industri | Tugas khas | Fokus seleksi |
|---|---|---|
| Pemrosesan kimia | Process isolation and utility headers | Media compatibility of body, kursi, packing and trim |
| Pengolahan air | Air bersih, dosing and filtration systems | Kelas tekanan, operating frequency and seat selection |
| Minyak dan gas | Non-critical process and utility isolation | Aman dari kebakaran, anti-static and emissions requirements |
| Kelautan dan lepas pantai | Kegunaan, cooling and selected seawater service | Duplex grade, galvanic compatibility and chloride limits |
Contoh aplikasi bukan merupakan persetujuan layanan. Pengguna akhir atau insinyur material perpipaan harus memverifikasi kompatibilitas korosi, batas tekanan-suhu, kelas emisi, frekuensi pengoperasian dan peraturan yang berlaku.
Dokumentasi inspeksi dan pasokan
EN 10204 3.1 catatan material dan ketertelusuran nomor panas saat dipesan.
Pengujian cangkang dan penutup/dudukan sesuai standar yang dipesan dengan kriteria penerimaan yang terdokumentasi.
Identifikasi material positif dan ruang lingkup PT/RT/UT diatur bila ditentukan dalam rencana pemeriksaan.
Ukuran, menandai, operasi, pelapisan/kebersihan, pengepakan dan berkas dokumen diperiksa sebelum pengiriman.
Daftar periksa RFQ
- Standar desain dan konstruksi katup
- Nominal size and pressure class or PN
- Tubuh, ball, tangkai, kursi, packing and bolting materials
- Full bore or reduced bore
- End connection and facing
- Manual operator or actuator requirements
- Cairan, design pressure and design temperature
- Aman dari kebakaran, emisi buronan, NACE dan persyaratan inspeksi
Pertanyaan yang sering diajukan
How does a floating ball valve seal?
Line pressure pushes the unsupported ball toward the downstream seat. This pressure-assisted contact creates shutoff, while seat design and material determine leakage class and operating torque.
When should a trunnion-mounted valve be considered instead?
Trunnion-mounted construction is commonly considered as size, tekanan, torsi, kebutuhan kontrol beban kursi atau layanan pipa meningkat. The selection must follow the project valve specification.
Which stainless steel body grade is most common?
CF8M and CF3M are common cast 316 and 316L-type grades. CF8 and CF3 are 304 and 304L-type grades. Actual corrosion suitability depends on the complete chemistry and operating conditions.
Can the valve be supplied fire-safe?
A fire-safe design can be offered only when the exact construction has appropriate qualification, such as testing to the specified API fire-test standard. It should not be inferred from the valve type alone.
What information is needed to size an actuator?
Provide differential pressure, cairan, suhu, operating time, fail position, power or air supply, safety factor and valve torque data for the selected seat and pressure condition.
Request a floating ball valve quotation
Kirim ukurannya, kelas, bahan, kursi, berakhir, operating conditions and actuation requirements for technical review.
