Zasuni od nehrđajućeg čelika are used for isolation in chemical processing, oil and gas and other industrial pipework where the selected materials suit the fluid. For a project buyer, “stainless steel” is only the starting point. The body grade, dotjerati, nazivni tlak, connections and operator together define what is being supplied. This guide explains the main specification items to compare before requesting a quotation.
Materijali karoserije i ukrasa
Common stainless steel descriptions include 304, 316 i 316L, but an order should identify the actual material grade for each main part, including whether the body is cast or forged. Body and trim need not be the same material. Stem and seating materials are selected for the service and wear requirements. Stellite, na primjer, is a cobalt-based hardfacing alloy family, not a stainless steel grade. If your valve list specifies trim materials, include them rather than describing the assembly only as “316 stainless steel”.
Oznake tlaka i temperature
Zasuni od nehrđajućeg čelika are supplied in different pressure classes and PN ratings. A Class number is a rating designation, not a fixed working pressure in psi. Use the applicable pressure-temperature data for the selected material and construction, and compare it with the project conditions. Cryogenic and high-temperature duties need suitable complete designs; a generic stainless steel description does not establish a single temperature range for every valve.
Završi vezu
Zasuni od nehrđajućeg čelika dostupni su s različitim krajnjim priključcima za jednostavnu integraciju u sustave cjevovoda. Uobičajeni krajnji priključci uključuju:
Kraj prirubnice: Ventili s krajevima prirubnice dizajnirani su za pričvršćivanje vijcima ili klinovima na odgovarajuću prirubnicu na sustavu cjevovoda.
Sučeoni zavareni krajevi: Ovi ventili imaju skošene krajeve koji se mogu sučeono zavariti izravno na sustav cjevovoda.
Zavareni krajevi: Zavareni krajevi s utičnicom dizajnirani su za zavarivanje na spojeve cijevi pomoću zavarenog spoja s utičnicom.
Navojni krajevi: Ventili s navojnim krajevima omogućuju jednostavno uvlačenje u navojne spojeve. For a flanged replacement, confirm the mating flange standard and facing as well as the valve size. For threaded ends, specify the thread form; a nominal inch size alone does not establish compatibility.
Standardi dizajna i certifikati
Project specifications may refer to ASME B16.34 for valve construction and pressure-temperature requirements, API 600 for its defined steel gate valve designs, or ISO 15761 for certain smaller steel valves. They have different scopes rather than being interchangeable labels. Additional requirements such as fire testing to an applicable standard or fugitive-emissions qualification to ISO 15848 should be agreed for the actual valve design. API 607 is a fire-test standard, not a general fire-protection approval. For cryogenic duty, agree the applicable service standard and test requirements before ordering.
Tip aktuatora
Zasuni od nehrđajućeg čelika mogu biti ručno upravljani ili opremljeni različitim tipovima pokretača, uključujući:
Operator ručnog kotača: Koristite ručni kotač za jednostavno ručno upravljanje.
Operatori zupčanika: Operatori zupčanika pružaju veću mehaničku prednost i omogućuju lakše ručno upravljanje velikim ventilima.
Pneumatski aktuatori: Ovi aktuatori koriste komprimirani zrak za otvaranje i zatvaranje ventila, često za daljinski ili automatizirani rad.
Električni aktuatori: Električni aktuatori koriste električne motore za upravljanje ventilima, obično upravlja programabilnim logičkim kontrolerom (PLC) ili distribuirani sustav upravljanja (DCS).
Compare the valve specification and operating arrangement together. A manual isolation valve in an accessible line and an electrically operated valve on a remote pipe rack may need the same body material but different supporting equipment. Include the available power and control requirements where actuation forms part of the order.
Stainless Steel Gate Valve Options from Farpro
Naše Z40W and Z41W wedge gate valve page lists existing stainless steel configurations, including CF8 body and F304 stem material references. For electric operation, see the Z941W electric flanged gate valve. These product entries give you specific models to compare with the valve list, rather than starting from a broad material description.
Have a project specification ready? Send Farpro your valve enquiry with the size, količina, destination and any required material or connection standard. Za zamjenu, an existing model and nameplate photo can help us identify which details need checking before we quote. If some items are still undecided, tell us about the fluid and the job, and we can discuss the options with you.