iTukutuku Matailalai ni iYau
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 (k.v., 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, kaukauwa, and cost-effectiveness, often coated with paint or epoxy for corrosion resistance. Ductile iron offers enhanced impact resistance. For more demanding applications, carbon steel, stainless steel (k.v., 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 (k.v., 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 (k.v., 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.
TTW Rawarawa
Eda dau cavuta se sauma lesu ena loma ni 5 miniti-4 na auwa ni oti na nomu vakatataro.
Kevaka o sa rui vakatotolotaka mo rawata na isau, pls qiriti keimami se tukuna vei keimami ena nomuni imeli me rawa ni keimami raica na nomuni vakaliuca na nomuni vakatataro.
Ni oti na veivakadeitaki ni isau, e rawa ni o gadreva na sabolo me dikevi kina na neitou ivakarau. Kevaka o gadreva na sabolo, eda na sauma na
na isau ni sabolo. Ia na sabolo ni isau e rawa ni saumi lesu ni oti na veivakadeitaki ni ota ni sa levu cake na nomu iwiliwili ni ota me baleta na MOQ.
Io, e tiko e dua na neitou timi ni cakacaka ka vutuniyau na veika e sotavi ena buli iyaya. Sa rawa ni da vakarautaka na kena levu, maka ni iyaya, kei na kote. E rawa talega ni keitou vakarautaka na pakete me vaka na nomu kerekere na isau ni sabolo. Ia na sabolo ni isau e rawa ni saumi lesu ni oti na veivakadeitaki ni ota ni sa levu cake na nomu iwiliwili ni ota me baleta na MOQ.
Ni oti na nomu sauma na sabolo ka vakauta mai na faile vakadeitaki, na sabolo ena vakarau tu ena 1-5 siga ni kena vakamatatataki wasoma. Se ena taura e 15 siga me caka kina na sabolo vou. Ena vakau yani vei iko na sabolo ena kena vakaraitaki ka yaco yani ki na 3-5 siga. E rawa ni o vakayagataka na nomu akaude vakaraitaki se sausaumi keitou taumada kevaka e sega na nomu akaude.
Dina, ena vakatau ena iwiliwili ni ota kei na nomu gagadre ni ivoli. E vakavuqa ni na rauta ni 20 ~ 35days.
a: Ni bibi e lailai sobu mai na 100kg, keitou vakatura na vakau mai vei FedEx, DHL, se UPS; oqo na totolo ka cecere duadua
sau levu.
b: Me baleta na bibi e tiko ena maliwa ni 100-200kg, keitou vakatura na vakau ena cagi; oqo e totolo ka sau levu
c: Ni bibi e sivia na 200kg, keitou vakatura na vakau e wasawasa; oqo na berabera ka sau lailai duadua e rawa ni da dikeva na iyaya ena kena vakaraitaki/ena cagi/e wasawasa me baleta na nomu jeke kevaka o gadreva, e rawa ni o digitaka na kena e rawarawa se sau levu duadua vei iko. Pls, tukuna vei keitou na ivakarau ni kena vakau ni ko vakadeitaka na ota.
Vakatataro ni Ivoli
Eda na sauma mai e loma 12 auwa, yalovinaka vakarorogo ki na imeli ka tiko na kena ikuri "@bwvalves.com".
Vakatalega kina, e rawa ni o lako ki na Tabana ni Veitaratara, ka na vakarautaka e dua na fomu matailalai cake, kevaka me levu cake na nomu vakatataro baleta na ivoli se o na vinakata mo rawata e dua na iwali ni wainidromu ka veivosakitaki na kena iwali.
Era na sauma na noda kenadau ni volivolitaki ena loma ni 24 auwa, yalovinaka vakarorogo ki na imeli ka tiko na kena ikuri "@bwvalves.com".
Keitou sauma vakavinaka na nomuni kerekere me baleta na faile veisemati ena loma ni 24 auwa, yalovinaka vakarorogo ki na imeli ena suffix "@bwvalves.com”.
Keitou na sega ni vakaosoosotaki iko. Sega na vakau itukutuku vakasisila.
Keitou sauma vakavinaka na nomuni kerekere me baleta na “BMAG Valves Catalog 2024″ itukutuku ena loma ni 24 auwa, yalovinaka vakarorogo ki na imeli ena suffix "@bwvalves.com”.
Keitou na sega ni vakaosoosotaki iko. Sega na vakau itukutuku vakasisila.
