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Dwyer 蝶閥 WE20系列

Lug or Wafer, EPDM or PTFE, Electric or Pneumatic Actuators

WE20系列蝶閥有凸耳式或晶圓式閥體，配置聚四氟乙烯或三元乙丙橡膠襯墊。WE20系列蝶閥最關鍵的方面是插裝閥座設計，這減輕了與普通“鴿尾設計”閥座相關的安裝問題。由于閥座動力學不依賴于兩個法蘭之間的耦合，因此閥門扭矩更低，也更一致。閥瓣和閥體的精密加工使得插裝結構能夠保持更緊密的閥瓣與閥座的公差，每次閥門循環時都提供完美的低扭矩密封。閥座到閥瓣密封獨立于法蘭支撐，能夠進行全額定終端應用。執行機構直接安裝，為緊湊的空間創建一個緊湊的總成。限位開關可以直接安裝在閥門上，從而實現遠程位置指示。WE20系列可配置電動或氣動執行器。電動執行器有耐候性或防爆性，多種供電電壓和雙位置或調制控制。雙位置執行器使用電源電壓驅動閥門開啟或關閉，而調制執行器接受4-20 mA輸入來進行閥門定位。執行機構具有熱過載保護和永久潤滑齒輪系統。氣動雙作用執行器利用供氣來驅動閥門開啟和關閉。執行器有兩個供氣口，一個驅動閥門開啟，另一個驅動閥門關閉。彈簧復位氣動執行器利用供氣打開閥門，內加載彈簧將閥門復位到關閉位置。

氣動雙作用執行器利用供氣來驅動閥門開啟和關閉。執行器有兩個供氣口，一個驅動閥門開啟，另一個驅動閥門關閉。彈簧復位氣動執行器利用供氣打開閥門，內加載彈簧將閥門復位到關閉位置。SV3電磁閥還可用于在供氣端口之間電動切換供氣壓力，以開啟和關閉閥門。執行機構由陽極氧化和環氧涂層鋁構成，可多年防腐使用。

規格規格


SPECIFICATIONS VALVE

Service    Compatible liquids, gases, and steam.

Body    2-way, wafer or lug butterfly.

Line Sizes    2 to 12".

End Connections    Lug and wafer pattern designed for flanges that are ANSI Class 125 (B16.1) and ANSI Class 150 (B16.5) dimension.

壓力范圍    225 psi (15.5 bar).

Wetted Materials    Body Material: Ductile iron; Disc: 316 SS; Seat: EPDM or PTFE; O-ring: EPDM; Stem: 410 SS.

Temperature Limits    Disc: EPDM: -50 to 250°F (-46 to 121°C);

                                      PTFE: 0 to 300°F (-18 to 149°C).

Bearings    Nylatron.

Operator    2 to 6" 10-position locking hand lever; 8 to 12": manual gear.

 

ACTUATORS

Pneumatic “DA” and “SR” Series Type    DA series is double acting and SR series is spring return (rack and pinion).

Normal Supply Pressure    DA: 40 to 115 psi (2.7 to 7.9 bar); SR: 70 to 115 psi (4.8 to 7.9 bar).

Maximum Supply Pressure    120 psi (8.6 bar).

Air Connections    DA03 thru DA11: 1/4" FNPT; SA03 thru SR11: 1/4" FNPT.

Housing Material    Anodized aluminum body and epoxy coated aluminum end caps.

Temperature Limits    -40 to 176°F (-40 to 80°C).

Accessory Mounting    NAMUR standard.

 

Electric "TD" and "MD" Series

Power Requirements    110 VAC, 220 VAC or 24 VAC.

Power Consumption    See instruction manual.

Cycle Time (per 90°)    TD01 and MD01: 4 s; TD02 and MD02: 20 s; TD03 and MD03: 30 s; TD04 and MD04: 30 s; TD05 and MD05: 30 s; TD06 and MD06: 45 s; TD07 and MD07: 30 s.

Duty Rating    85%.

Enclosure Rating    NEMA 4X (IP67).

Housing Material    Powder coated aluminum.

Temperature Limits    -22 to 140°F (-30 to 60°C).

Electrical Connection    1/2" female NPT.

Modulating Input    4 to 20 mA.

Standard Features    Manual override, position indicator, and TD models come with two limit switches.

 

Electric "TH" and "MH" Series

Power Requirements    110 VAC, 220 VAC, 24 VAC or 24 VDC.

Power Consumption    See instruction manual.

Cycle Time (per 90°)    See instruction manual.

Duty Rating    See instruction manual.

Enclosure Rating    NEMA 7, designed to meet hazardous locations: Class I, Group C & D; Class II, Group E, F & G; Division I & II.

Housing Material    Powder Coated Aluminum.

溫度范圍    -22 to 140°F (-30 to 60°C).

Electrical Connection    1/2" female NPT.

Modulating Input    4 到 20 mA.

Standard Features    Position indicator and two limit switches.

 

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