Dwyer 美國(guó)德威爾

PBV系列工程塑料二通自動(dòng)球閥 dwyer 德威爾

dwyer產(chǎn)品銷售產(chǎn)品選型產(chǎn)品報(bào)價(jià) 技術(shù)支持售后服務(wù)
美國(guó)德威爾壓差表流量計(jì) 差壓計(jì) 差壓開關(guān) 差壓變送器
產(chǎn)品廣泛應(yīng)用于暖通空調(diào) 食品制藥生物工程智能樓宇電廠化工水處理環(huán)境監(jiān)測(cè) 工業(yè)制造等領(lǐng)域
產(chǎn)品描述：美國(guó)Dwyer德威爾儀器儀表制造有限公司(Dwyer Instruments,Inc.)是一家對(duì)差壓、溫度、液位和流量的測(cè)量,變送和控制等方面擁有眾多精密儀器儀表產(chǎn)品并且在價(jià)格上有強(qiáng)競(jìng)爭(zhēng)力的儀器儀表制造公司。
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PBV系列工程塑料二通自動(dòng)球閥
產(chǎn)品說明：
電動(dòng)和氣動(dòng)執(zhí)行機(jī)構(gòu)
PBV系列工程塑料三通自動(dòng)球閥最適合用于化工，灌溉，游泳池和溫泉系統(tǒng)等。有很好的防泄漏性能，增強(qiáng)的TFE閥座和EPDM密封能保證使用壽命長(zhǎng)。全PVC或CPVC的材質(zhì)，結(jié)構(gòu)牢固，重量輕?？涩F(xiàn)場(chǎng)選擇NPT螺紋連接或套管連接方式。
PBV系列為經(jīng)濟(jì)型的自動(dòng)控制閥，可配備電動(dòng)或氣動(dòng)執(zhí)行機(jī)構(gòu)。電動(dòng)執(zhí)行機(jī)構(gòu)型為NEMA 4 全天候防護(hù)，115VAC供電，可選兩位控制或連續(xù)控制。兩位式控制采用115VAC直接驅(qū)動(dòng)閥門打開或關(guān)閉，連續(xù)控制方式接受4-20mA輸入信號(hào)，控制閥門到任意位置。執(zhí)行機(jī)構(gòu)帶有過載保護(hù)，閥位指示和自潤(rùn)滑傳動(dòng)等功能。
氣動(dòng)雙作用執(zhí)行機(jī)構(gòu)采用氣源直接控制兩個(gè)進(jìn)氣孔來打開或關(guān)閉閥門，彈簧回位式氣動(dòng)執(zhí)行機(jī)構(gòu)采用氣源驅(qū)動(dòng)一個(gè)方向，內(nèi)部彈簧回力驅(qū)動(dòng)另外一個(gè)方向?？蛇x擇SV3電磁先導(dǎo)閥來電動(dòng)控制氣源壓力實(shí)現(xiàn)閥門的控制。鋁制結(jié)構(gòu)的執(zhí)行機(jī)構(gòu)，采用環(huán)氧樹脂涂層保護(hù)，使得它防腐耐用。
產(chǎn)品規(guī)格：
Service: Compatible liquids or gases.
Body: 2-way.
Line Size: 1/2" to 4".
End Connections: Female NPT or socket (for 1/2" through 2"); socket only (for 2- 1/2" through 4").
Pressure Limit: 1/2" to 2": 232 psi (16.0 bar) @ 73°F (23°C); 2-1/2" to 4": 150 psi (10.3 bar) @ 73°F (23°C) WOG. Vacuum: 29" Hg.
Wetted Materials: Body & End Connections: PVC or CPVC; Ball & Stem: PVC or CPVC; Seat: TFE; Stem Seal: EPDM.
Temperature Limit: 32 to 140°F (0 to 60°C).
Other Materials: Stem Bearing: Polypropylene (1-1/4" and up).
ACTUATORS
Electric
Power Requirements: 120 VAC, 50/60 Hz, single phase. Optional 220 VAC, 24 VAC, 12 VDC, and 24 VDC.
Power Consumption (Locked Rotor Current): Two Position: 1/2" to 1-1/2": 0.55A; 2" to 4": 0.75A. Modulating: 1/2" to 2": 0.75A; 2-1/2": 1.1A; 3" to 4": 0.75A.
Cycle Time (per 90°): Two Position: 1/2" to 1-1/2": 2.5 sec.; 2" to 2-1/2": 5 sec.; 3" to 4": 15 sec. Modulating: 1/2" to 2-1/2": 5 sec.; 3" to 4": 15 sec.
Duty Cycle: Two Position: 1/2" to 1-1/2": 75%; 2" to 4": 25%. Modulating: 75%.
Enclosure Rating: NEMA 4. Optional NEMA 7 (Class 1, Div. II, Groups A, B, C, D).
Housing Material: Aluminum with thermal bonding polyester powder finish.
Temperature Limit: 0 to 150°F (-18 to 65°C).
Conduit Connection: 1/2" female NPT.
Modulating Input: 4 to 20 mA.
Standard Features: Manual override and visual position indicator except modulating units.
Pneumatic "DA" and "SR" Series
Type: DA series is double acting and SR series is spring return (rack and pinion).
Normal Supply Pressure: 80 psi (5.5 bar).
Maximum Supply Pressure: 120 psig (8 bar).
Air Connections: DA1 to 5 and SR2 to 5: 1/8" female NPT; all others: 1/4" female NPT.
Air Consumption (per stroke): DA1: 2.32 cu. in.; DA2: 9.34 cu. in.; DA3: 17.21 cu. in.; DA4: 20.5 cu. in.; SR2: 9.34 cu. in.; SR3: 17.21 cu. in.; SR6: 54.34 cu. in.; SR7: 85.43 cu. in.
Cycle Time (per 90°): DA1: .03 sec.; DA2: .04 sec.; DA3: .08 sec.; DA4: .12 sec.; SR2: .09 sec.; SR3: .14 sec.; SR6: .46 sec.; SR7: .83 sec.
Housing Material: Anodized aluminum body and epoxy coated aluminum end caps.
Temperature Limit: -4 to 180°F (-20 to 82°C).
Accessory Mounting: NAMUR standard.
Standard Features: Visual position indicator.

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