Panoramica del prodotto

ILValvola a farfalla wafer ad azionamento pneumatico is a high-performance flow control valve designed for reliable on/off and modulating service in demanding industrial piping systems. Manufactured with a 304 stainless steel disc and a rugged metal hard seal construction, this valve provides exceptional durability, resistenza alla corrosione, and bubble-tight shut-off across a wide range of media including water, aria, gas, olio, vapore, e prodotti chimici. The wafer-type body with compact design installs easily between flanges, requiring minimal space and reducing installation costs. Equipped with a high-performance pneumatic actuator, this valve delivers fast response, precise control, and reliable operation in automated systems. Available in sizes from DN50 to DN1200 (2″ to 48″) with a wide temperature range from -40°C to +600°C, this valve is suitable for a broad spectrum of applications including chemical processing, olio & gas, generazione di energia, trattamento dell'acqua, e sistemi HVAC. It is the trusted choice for engineers and plant operators worldwide.

Valvola a farfalla wafer ad azionamento pneumatico

Specifiche tecniche

Valvola a farfalla wafer ad azionamento pneumatico

Caratteristiche principali

1. 304 Stainless Steel Disc – Superior Corrosion Resistance
2. Metal Hard Seal – High Temperature & Wear Resistant
3. Pneumatic Actuator – Fast Response & Reliable Control
4. Wafer Type Design – Compact & Space-Saving
5. Wide Temperature Range – -40°C to +600°C
6. Multiple Material Options – Customizable
7. ISO 5211 Mounting – Standard Actuator Interface

Principio di funzionamento

The pneumatic actuated butterfly valve operates through a simple yet reliable mechanism:

• 1. Actuator Operation: Compressed air is supplied to the pneumatic actuator. For double-acting actuators, air enters one side to open the valve and the other side to close it. For spring-return actuators, the valve is opened or closed by air pressure and returns to the fail-safe position when air supply is lost.
• 2. Valve Operation: The actuator drives the stem, which rotates the disc 90° from fully closed to fully open. The disc provides bi-directional sealing against the seat.
• 3. Control Options: The valve can be controlled by a solenoid valve (on/off control) or a positioner (modulating control with 4-20mA or 0-10V signal).

Valvola a farfalla wafer ad azionamento pneumatico

Applicazioni

1. Elaborazione chimica
2. Olio & Gasdotti
3. Generazione di energia
4. Acqua & Wastewater Treatment
5. HVAC & District Heating

Imballaggio e spedizione

L'imballaggio dipende dal tipo e dalla quantità del prodotto. Options include wooden crates or carton boxes with proper protection for actuator and valve body. La spedizione può essere organizzata via mare, ferrovia, aria, o secondo la richiesta del cliente.

Valvola a farfalla wafer ad azionamento pneumatico

Profilo Aziendale

Luoyang Datang Energy Tech Co., Ltd is a professional industrial valve supplier, dedicated to providing reliable flow control solutions for chemical, olio & gas, generazione di energia, trattamento dell'acqua, HVAC, e sistemi di tubazioni industriali in tutto il mondo. Tutti i prodotti sono realizzati secondo gli standard internazionali CE e ISO 9001 certificazioni. Con oltre 10 anni di esperienza, una struttura moderna di 80,000 mq, E 200+ dipendenti professionisti, serviamo i clienti in 10+ paesi con prodotti di qualità, prezzi competitivi, e consegna affidabile.

Termini di pagamento

T/T, L/C a vista, Unione occidentale, PayPal, Apple Pay, Google Pay, Carta di credito, ecc.

Valvola a farfalla wafer ad azionamento pneumatico

Domande frequenti

Q1: What is the difference between pneumatic and electric actuators?

UN: Pneumatic actuators are driven by compressed air, offering fast response, high thrust, and excellent explosion-proof capabilities; they are suitable for hazardous areas and frequent operation. Electric actuators are powered by electricity, offering higher precision and eliminating the need for an air supply; they are suitable for locations lacking compressed air systems. The choice depends on on-site air supply conditions and control precision requirements.

Q2: What is the difference between metal-to-metal (hard) sealing and soft sealing?

UN: Metal-to-metal sealing utilizes metal-on-metal contact, capable of withstanding temperatures up to 600°C; it is wear- and corrosion-resistant, making it suitable for high-temperature steam, hot oil, and abrasive media. Soft sealing (EPDM/PTFE/Viton) provides bubble-tight sealing but has a limited temperature range (typically ≤200°C). The choice depends on the medium’s temperature, pressione, and corrosiveness.

Q3: Do pneumatic actuators support explosion-proof requirements?

UN: SÌ. Pneumatic actuators do not generate electrical sparks and are inherently explosion-proof. When paired with explosion-proof solenoid valves and positioners, the entire valve assembly meets explosion-proof zone requirements (Exd/Exia), making it suitable for hazardous environments such as petrochemical plants.

Q4: How is automated control achieved with pneumatic butterfly valves?

UN: Pneumatic butterfly valves achieve on/off control via solenoid valves and modulating control via positioners (using 4-20mA or 0-10V signals). The system consists of an air preparation unit (filter-regulator + lubricator), a solenoid valve or positioner, and a pneumatic actuator, allowing for seamless integration into DCS, PLC, and SCADA systems.

Q5: What is the difference between wafer-style and lug-style butterfly valves?

UN: Wafer-style butterfly valves are installed between two flanges using through-bolts; they are compact, leggero, ed economico. Lug-style butterfly valves feature threaded lugs on both sides, allowing them to be bolted individually to flanges; this supports single-sided isolation, enabling the removal of downstream piping without draining the system. The choice depends on installation space and maintenance requirements.

Valvola a farfalla wafer ad azionamento pneumatico