Cikakken Bayani
Handwheels are a traditional and widely utilized actuating mechanism, particularly for multi-turn valves such as gate, globe, diaphragm, and needle valves, where precise flow regulation or high seating forces are required.
Principle of Operation:
Unlike the quick quarter-turn action of lever handles, handwheels facilitate gradual and controlled valve operation. The operator rotates the handwheel, which is typically connected to a threaded valve stem. This rotary motion is converted into linear motion of the stem, which, in turn, moves the valve’s closure element (e.g., disc, plug, or gate) to open, close, or throttle the flow. The mechanical advantage provided by the handwheel’s diameter and the stem’s thread pitch allows operators to generate significant torque. This enables fine adjustments for flow control (throttling) and ensures a tight seal when the valve is closed, even against high pressures. The number of turns required from fully open to fully closed varies depending on the valve size and design.
Material Selection:
The choice of material for handwheels is dictated by operational requirements, environmental conditions, and cost considerations:
Metals: Cast iron is prevalent due to its strength, durability, and cost-effectiveness, often coated with paint or epoxy for corrosion resistance. Ductile iron offers enhanced impact resistance. For more demanding applications, carbon steel, bakin karfe (e.g., 304, 316 for corrosive media), or aluminum (for lighter weight) may be used.
Plastics/Composites: Phenolic resins are common, providing good grip, electrical insulation, and resistance to moderate heat and chemicals. Reinforced engineering plastics (e.g., nylon, polypropylene) offer a balance of strength, chemical resistance, and lower weight.
Metal handwheels are often designed with spokes or a solid disc, and some feature ergonomic rims or may be covered with non-slip coatings for improved grip and operator comfort.
Color-Coding for System Identification:
Similar to lever handles, color-coding handwheels is a critical practice for enhancing safety, preventing operational errors, and improving system management in industrial plants and utility networks. While specific color standards can vary by industry, region, or company policy, common conventions include:
Red: Universally recognized for fire protection systems (e.g., hydrants, sprinkler control valves) or emergency shut-off valves.
Yellow: Frequently used to denote gas lines (natural gas, LPG, process gases).
Blue: Often indicates potable water or general water services.
Green: May signify non-potable water, air lines, or specific process fluids.
Black/Grey: Can be standard for general utilities, steam lines (though dedicated steam colors like silver or orange are sometimes used), or non-critical services.
Orange: Sometimes used for specific chemicals, oils, or steam.
FAQs masu sauƙi
Mu yawanci mukan faɗi ko amsa a ciki 5 mintuna-4 hours bayan mun sami tambayar ku.
Idan kuna gaggawa don samun farashin, pls ku kira mu ko ku gaya mana a cikin imel ɗin ku don mu ɗauki fifikon tambayarku.
Bayan tabbatar da farashin, zaka iya buƙatar samfurori don duba ingancin mu. Idan kuna buƙatar samfuran, za mu yi caji
farashin samfurin. Amma farashin samfurin za a iya dawowa bayan tabbatar da oda lokacin da adadin ku ya fi game da MOQ.
Ee, muna da ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwarewa a cikin masana'antu. Muna iya samar da masu girma dabam na musamman, maki na abu, da shafi. We also could supply the package according to your request the sample cost. Amma farashin samfurin za a iya dawowa bayan tabbatar da oda lokacin da adadin ku ya fi game da MOQ.
Bayan kun biya cajin samfuran kuma aika mana fayilolin da aka tabbatar, samfuran za su kasance a shirye a ciki 1-5 kwanaki don ƙayyadaddun yau da kullun. Ko zai dauki game da 15 kwanaki don samar da sababbin samfurori. Za a aika maka samfuran ta hanyar bayyanawa kuma su shigo 3-5 kwanaki. Kuna iya amfani da asusun ajiyar ku ko ku biya mu kafin lokaci idan ba ku da asusu.
Gaskiya, ya dogara da adadin tsari da takamaiman bukatun samfuran ku. Yawanci zai kasance a kusa da 20-35days.
a: Domin nauyi ne kasa da 100kg, muna ba da shawarar jigilar kaya ta FedEx, Farashin DHL, ya da UPS; wannan shi ne mafi sauri kuma mafi
tsada.
b: Domin nauyi ne tsakanin 100-200kg, muna ba da shawarar jigilar kaya ta iska; wannan yana da sauri da tsada
c: Domin nauyi ya wuce 200kg, muna ba da shawarar jigilar kaya ta teku; Wannan shi ne mafi hankali kuma mafi arha Za mu iya duba jigilar kaya ta hanyar faɗakarwa / ta iska / ta teku don duba ku idan kuna buƙata, za ka iya zaɓar wanda ya fi dacewa ko kuma mafi tsada a gare ku. Pls, sanar da mu sharuɗɗan bayarwa lokacin da kuka tabbatar da oda.
Binciken samfur
Za mu amsa a ciki 12 hours, da fatan za a kula da imel tare da suffix "@bwvalves.com".
Hakanan, za ku iya zuwa wurin Shafin Tuntuɓi, wanda ke ba da ƙarin cikakken tsari, idan kuna da ƙarin tambayoyin samfura ko kuna son samun shawarwarin warware matsalar bawuloli.
Masana tallace-tallacenmu za su amsa a ciki 24 hours, da fatan za a kula da imel tare da suffix "@bwvalves.com".
Muna amsa da kyau ga buƙatunku don fayil mai alaƙa a ciki 24 hours, da fatan za a kula da imel tare da suffix"@bwvalves.com”.
Ba za mu dame ku ba. Babu spam.
Muna amsa da kyau ga buƙatunku don “BMA Ba'al Valves Cataloog 2024″ bayani a ciki 24 hours, da fatan za a kula da imel tare da suffix"@bwvalves.com”.
Ba za mu dame ku ba. Babu spam.
