Dwyer产品 PBV系列工程塑料二通自动球阀美国德威尔压差表流量计差压计差压开关差压变送器

PBV系列工程塑料二通自动球阀
产品说明：
电动和气动执行机构
PBV系列工程塑料三通自动球阀最适合用于化工，灌溉，游泳池和温泉系统等。有很好的防泄漏性能，增强的TFE阀座和EPDM密封能保证使用寿命长。全PVC或CPVC的材质，结构牢固，重量轻。可现场选择NPT螺纹连接或套管连接方式。
PBV系列为经济型的自动控制阀，可配备电动或气动执行机构。电动执行机构型为NEMA 4 全天候防护，115VAC供电，可选两位控制或连续控制。两位式控制采用115VAC直接驱动阀门打开或关闭，连续控制方式接受4-20mA输入信号，控制阀门到任意位置。执行机构带有过载保护，阀位指示和自润滑传动等功能。
气动双作用执行机构采用气源直接控制两个进气孔来打开或关闭阀门，弹簧回位式气动执行机构采用气源驱动一个方向，内部弹簧回力驱动另外一个方向。可选择SV3电磁先导阀来电动控制气源压力实现阀门的控制。铝制结构的执行机构，采用环氧树脂涂层保护，使得它防腐耐用。
产品规格：
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.