Dwyer产品 Series WE012-Piece NPT Stainless Steel Ball Valve 美国德威尔压差表流量计差压计差压开关差压变送器

Series WE01
2-Piece NPT Stainless Steel Ball Valve is great flow rates with minimal pressure drop. Features a blowout proof stem for added safety, reinforced PTFE seats and seals, and a 316 SS ball for better performance.
Full Port, Vented Ball, Electric or Pneumatic Actuators
The Series WE01 incorporates a full port 2-piece SS ball valve for great flow rates with minimal pressure drop. The valve features a blowout proof stem for added safety, reinforced PTFE seats and seals for longer life, and a 316 SS (ASTM CF8M) ball for better performance. Actuators are direct mounted creating a compact assembly for tight spaces. Limit switches are able to be mounted directly to the valves allowing for remote position indication. The Series WE01 can be configured with either an electric or pneumatic actuator. Electric actuators are available in weatherproof or explosion-proof, a variety of supply voltages and two-position or modulating control. Two-position actuators use the supply voltage to drive the valve open or closed, while the modulating actuator accepts a 4 to 20 mA input for valve positioning. Actuators feature thermal overload protection and permanently lubricated gear train.
The pneumatic double acting actuator uses an air supply to drive the valve open and closed. The actuator has two supply ports, with one driving the valve open and the other driving the valve closed. Spring return pneumatic actuators use the air supply to open the valve and internally loaded springs return the valve to the closed position. Also available is the SN solenoid valve to electrically switch the air supply pressure between the air supply ports for opening and closing the valve. Actuators are constructed of anodized and epoxy coated aluminum for years of corrosion free service.
Service: Compatible liquids and gases.
Body: 2-piece.
VALVE
Line Sizes: 1/2 to 3".
End Connections: Female NPT.
Pressure Limits: 28" Hg to 1000psi (-0.7 to 69 bar).
Wetted Materials: Body and Ball: 316 SS (CF8M); Stem: 316SS; Seat: RTFE/PTFE; Seal, Washer and Packing: PTFE.
Temperature Limits: -20 to 392°F (-29 to 200°C).
Other Materials: O-ring: Fluoroelastomer; Handle: 304 SS; Washer: 301 SS; Stem Nut, Locking Device, Gland Ring: 304SS; Handle Sleeve: PVC.
ACTUATORS
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: 80 psi (5.5 bar).
Maximum Supply Pressure: 120 psi (8.6 bar).
Air Connections: DA01: 1/8" female NPT; DA02 to DA5: 1/4" female NPT; SR02 to SR07: 1/4" female NPT.
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.

Power Requirements: 110 VAC, 220 VAC, 24 VAC or 24 VDC (MD models not available in 24 VDC).
Power Consumption: See instruction manual.
Cycle Time (per 90°): TD01 4 s; MD01: 10 s; TD02 and MD02: 20 s; TD03 and MD03: 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.
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.
Temperature Limits: -40 to 140°F (-40 to 60°C).
Electrical Connection: 1/2" female NPT.
Modulating Input: 4 to 20 mA.
Standard Features: Position indicator and two limit switches.
Electric “TD” and “MD” Series
Pneumatic “DA” and “SR” Series
Electric “TI” and “MI” Series
Agency Approvals: Meets the technical requirements of EU Directive 2011/65/ EU (RoHS II).