Detalles ar producto
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., disco, 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, durabilidad, ne ar eficacia ir nge ya costos, often coated with paint or epoxy for corrosion resistance. Ductile iron offers enhanced impact resistance. For more demanding applications, carbon steel, stainless steel (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.
Ya nt'a̲ni frecuentes sencillas
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Nu'bu̲ gar na urgente da hyoni ar precio, pls ga xekwi wa mä ga ja ár correo electrónico pa da consideremos ár prioridad ar hño nthoki.
'Mefa xta confirmación ar precio, Pe requerir muestras pa gí hñeti ha ma hño. Nu'bu da t'ot'e ya muestras, Cobraremos nge
Ar costo ar muestra. Pe ar costo ar muestra to da reembolsable 'mefa xta confirmación ar pedido nu'bu̲ ár yá 'bede ya ar pedido ar nä'ä dige ar MOQ.
Hä, Di pehu̲ ko 'nar equipo xi hño ar tsa̲ ko 'nar tu ya mfeni jar fabricación. Dí mar tsa̲ ndi suministrar tamaños personalizados, Ya grado hñei, ne recubrimiento. 'Nehe podríamos suministrar ar paquete de acuerdo a ár zohni 'nehe ar costo ar muestra. Pe ar costo ar muestra to da reembolsable 'mefa xta confirmación ar pedido nu'bu̲ ár yá 'bede ya ar pedido ar nä'ä dige ar MOQ.
'Me̲fa gut'i ar 'be̲fi muestras ne pe̲hni ga archivos confirmados, Ya muestras wa ya listas jar 1-5 pa ar especificación regular. Wa da hñuts'i wa alrededor ar 15 pa producir 'ra'yo muestras. Ya muestras ar bí enviarán ya expreso ne ya llegarán jar 3-5 Ya pa. Tsa̲ da zu̲di ár 'nar nt'ot'ise̲ nu expresa wa gut'i ga ir adelantado nu'bu̲ hingi pe̲ts'i 'nar nu.
Honestamente, Bi jagu̲ju̲ yá 'bede jar pedido ne ya requisitos específicos ya productos. Ir general, será alrededor ar 20 ~ 35days.
'nar: Pa ar be̲xu ar inferior bí 100 ar kg, sugerimos ar envío ya FedEx, DHL, wa UPS; Nuna gehna mäs ar rápido ne nö'ö
hmädi.
b: Pa ar be̲xu ar entre 100 — 200kg, Sugerimos ar envío ya vía aérea; Nuna gehna rápido ne hmädi
c: Pa ar be̲xu ar mäs xi ngu 200kg, Sugerimos ar envío ya däzabi; Nuna gehna mäs ar lento ne ar mäs barato Podríamos gí hñeti ha ar carga ya expreso yá hño ndähi yá hño däzabi pa ár verificación nu'bu̲ nä'ä t'ot'e, To da 'ñets'i nä'ä da mäs mahyoni wa rentable pa nu'i. Pls, Informar ga ja ya nkohi entrega nu'bu̲ confirme ar pedido.
Hño nthoki productos
Fábrica Global de Productos Waterworks
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