Permukaan pengedap pintu masuk injap pintu baji berbentuk baji, itu dia, Ia membentuk sudut tertentu dengan garis tengah pintu gerbang. Tolak pintu untuk menutup batang injap. Apabila tujahan batang injap meningkat, Tekanan positif yang bertindak pada permukaan pengedap gerbang baji meningkat, membentuk meterai paksa. Peningkatan pengedap untuk media tekanan rendah. Pada masa yang sama, the gate moves away from the seat as it opens, mengurangkan haus permukaan pengedap.
Standard injap pintu gerbang baji: GB/T12234-2019 Valve Gate Steel dengan bonet bolted untuk industri minyak dan gas. GB/T12232-2005 Valve General Flange Connection Iron Gate Valve. Standard API 600-2015.Gerbang injap pintu baji dibahagikan kepada tiga bentuk struktur: Gerbang tunggal baji, Gerbang elastik baji, dan gerbang dua baji. Melalui ubah bentuk permukaan pengedap gerbang elastik jenis baji dan gerbang double jenis baji, kesan pengedap yang lebih baik dapat dibentuk dengan kerusi injap. Flexible and split-wedge arrangements can accommodate some seat movement, but thermal binding still needs to be considered for the selected construction and service.
Permukaan pengedap pintu masuk pintu masuk dan outlet injap pintu rata selari dengan garis tengah pintu gerbang. Meterai gerbang tunggal terutamanya bergantung pada medium untuk menolak pintu terapung atau kerusi injap terapung untuk disiapkan. Pengedap gerbang berganda dapat dicapai oleh mekanisme musim bunga atau pengembangan antara pintu gerbang. Seat contact during travel varies between slab, parallel-slide and expanding constructions. These arrangements should be distinguished when comparing how the valve seals and operates.
Standard injap pintu selari: GB/T23300-2009 Injap Pintu Flat. JB/T5298-2016 Valve Gate Flat Steel untuk saluran paip. API6D PIPELINE VALVE. API6A Wellhead dan Peralatan Pokok Krismas. Plat pintu masuk injap pintu rata dibahagikan kepada dua jenis: plat pintu tunggal dan plat pintu berganda. Pada masa yang sama, Pintu boleh dilengkapi dengan atau tanpa lubang panduan. Diameter dalaman pintu dengan lubang panduan adalah sama dengan kerusi injap, Yang memudahkan pembersihan saluran paip. Ia boleh digabungkan dengan kerusi injap untuk membentuk meterai akhir masuk, meterai akhir outlet, atau meterai akhir masuk dan keluar.
Perbezaan antara kedua -dua
- Standards and scope. The standard follows the valve construction and service. The references above are examples, not a statement that every valve meets all of them. Agree the applicable standard and edition in the purchase specification.
- Bentuk pintu berbeza. Bentuk pintu masuk injap pintu baji berbentuk baji. Plat pintu masuk injap pintu rata rata dan boleh dilengkapi dengan lubang panduan untuk memudahkan bola lulus dan pembersihan garis.
- Operating force and torque. A wedge uses stem thrust to develop seating force. A pressure-energized slab design and a mechanically expanding design load their seats differently. Saiz injap, pressure difference and seat arrangement all affect the operator required, so compare the proposed valve-and-operator assembly rather than assuming every flat gate valve needs less torque.
- Electric actuator settings. The seating method, end positions and torque protection belong to the particular valve and actuator assembly. Follow the manufacturer’s commissioning instructions; the words “wedge” or “flat” alone do not define all the switch settings.
- Zarah terampai. Solids can enter the seat area or abrade sealing surfaces. Contact between a parallel gate and its seats does not make the valve immune to particles. Describe the solids in the line when comparing the passage and seating arrangement.
- Perubahan suhu. Heating and cooling can affect the gate, tempat duduk, body and stem. Wedge flexibility and seat arrangement influence the response, but no gate family should be described as unable to bind. Include start-up, shutdown and normal operating temperatures in the selection discussion.
- Stem protection and space. A cover can protect exposed rising-stem threads from dust and weather. Covers and position indicators are features to specify for the installation, not a reliable way to distinguish wedge from flat gate valves. Check the clearance needed for the full stem travel.
- Lubrication and sealant. Some pipeline gate valves have seat or sealant-injection features, while other designs use different maintenance arrangements. Keep stem lubrication, packing maintenance and seat-sealant requirements separate, and use the products and procedures specified for the selected valve.
Matching the Gate Design to the Pipeline
A wedge gate and a parallel gate describe different sealing geometries, but neither name gives the complete valve specification. Parallel designs include several seat and gate arrangements; their operation, lubrication and maintenance requirements are not identical.
For a pipeline that will be pigged, check for a through-conduit construction and the required clear bore. The word “parallel” alone does not establish that a cleaning tool can pass through the valve. In plant isolation piping, the more immediate questions may be the available installation length, temperature changes and how the valve will be operated.
Suspended solids also need a closer look. Particle size, hardness and concentration affect the suitability of the seat arrangement; a gate geometry alone does not establish suitability for abrasive slurry. Begitu juga, actuator travel limits and torque settings belong to the specific valve-and-actuator instructions.
Browse injap pintu baji dan injap pintu selari to compare the available constructions. The siri pintu baji keluli tuang provides model-level material and operating details.
Discuss the Valve for Your Line
If you are replacing an existing valve, a nameplate photo, line size and connection standard are a useful starting point. Tell us what has prompted the change: leakage, difficult operation, solids in the line or a different operating duty. That background helps make the comparison relevant to your installation.
Send Farpro your gate valve requirement with the medium, tekanan kerja dan suhu, kuantiti dan destinasi. Include any pigging requirement or actuator supply and control needs. A short description is enough to begin; we can then discuss the appropriate construction and quotation scope.
For a broader introduction to the seating arrangements, see wedge vs parallel gate valves. Use this page alongside that overview when checking the details of a proposed valve.