Products
Control Valves Back to all Control Valves
- In this category:
- Type 2000 Valve Positioner
- VAC D400 Digital Positioner
- TA901 Transducer
- TA987 Air Filter/Regulator
- Electronic Temp. Sensor
- TR890 Series Electronic PID Controller
Control Loop Accessories
Type 2000 Valve Positioner
Specifications
| Type-2000 | Pneumatic |
| Input Signal | 3-15 PSI |
| Supply Pressure | 145 PSI maximum |
| Linearity Error | 0.7% full span |
| Hysteresis | 0.4% full span |
| Repeatability | 0.3% full span |
| Pressure Gain | 750 P-out/P-in |
| Flow Capacity
@ 20 PSI @ 87 PSI @ 145 PSI |
SCFM
9.5 28.3 47.1 |
| Air Capacity
@ 20 PSI @ 87 PSI @ 145 PSI |
SCFM
0.18 0.53 0.88 |
| Port Size | 1/4’’ NPT; Gauge Ports 1/8’’ NPT |
| Temperature Range | -40°F – 185°F |
| Enclosure | NEMA 4X |
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| Type-2000 | Electro-Pneumatic |
| Input Signal | 4-20 mA |
| Supply Pressure | 21.8 – 145 PSI |
| Linearity Error | <1.0% of full span |
| Hysteresis | <0.6% of full span |
| Repeatability | <0.5% of full span |
| Pressure Gain | 750 P-out/P-in |
| Flow Capacity
@ 20 PSI @ 87 PSI @ 145 PSI |
SCFM
9.5 28.3 47.1 |
| Air Capacity
@ 20 PSI @ 87 PSI @ 145 PSI |
SCFM
0.2 0.6 1.0 |
| Impedance | 260 Ohms at 70°F |
| Loop Load | 5.2 Volts at 70°F |
| Port Size | 1/2’’ NPT |
| Temperature Range | -40°F – 185°F |
| Enclosure | NEMA 4X |
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Typical Applications
Type 2000 Valve Positioners (Pneumatic and Electro-Pneumatic) are mechanical devices designed to provide enhanced control, stability, and shut-off capability in extreme flow applications. The positioner, which is mounted to the valve’s yoke assembly and linked to the valve stem, receives a signal from an external control source, compares the control signal to the actual position of the valve plug, and then sends a corrected signal to the valve’s actuator, thereby positioning the valve plug for optimum flow modulation.
CONTROL LOOP ACCESSORIES
VAC D400 Digital Positioner
Specifications
| Model | VAC D400 |
| Max. Air Supply | 90 PSI |
| Rotation | 25 – 120 degrees |
| Air delivery | 6.0 SCFM @ 90 PSI |
| Ambient temperature | -40 to 185°F |
| Connections | ¼’’ NPT Air ½’’ NPT Cable |
| Stroke | .4 to 4’’ |
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Typical Applications
The VAC D400 is a microprocessor based, “intelligent” instrument that can be mounted to rotary or linear pneumatic actuators for accurate positioner control. This unit, while sophisticated in its accuracy and performance, is simple to mount, calibrate, and with good filtered air and proper maintenance, can provide very accurate and trouble-free service for many years. Available with HART, FOUNDATION Fieldbus, or Profibus communication, the D400 range of applications and communications meets the latest industry standards. The “efficiencies” of the D400 are not only in its microprocessor-based technology and accuracy, but also in the pneumatic air handling where air consumption is kept to a very minimum.
Control Loop Accessories
TA901 Transducer
Specifications
| Model | TA901 |
| Input | 4-20 mA |
| Output | 1-17 PSIG Per ANSI/FCI 87-2 (Can be calibrated to provide 1-9 PSIG or 9-17 PSIG) |
| Volume Booster | Built-in volume booster allows flow capacity |
| Connections | Pneumatic: 1/4’’ NPT
Electric: 1/2’’ NPT |
| Accuracy | Terminal Based Linearity:
< ±0.75% of span Repeatability: < 0.5% of span Hysteresis: < 1.0% of span Response Time: < 0.25 sec. @ 3-15 PSIG |
| Ambient Temperature | -20°F to 140°F |
| Min. Air Supply Pressure | 3 PSIG |
| Max. Air Supply Pressure | 100 PSIG |
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Typical Applications
The TA901 Electropneumatic (I/P) Transducer converts a milliamp current signal to a linearly proportional pneumatic output pressure. This transducer is designed for control applications that require a high degree of reliability and repeatability. The TA901 is used in the control operation of valve actuators and pneumatic valve positioners in the petrochemical, HVAC, energy management, textile, paper, and food & drug industries.
Control Loop Accessories
TA987 Air Filter/Regulator
Specifications
| Model | TA987 |
| Max. Air Supply Pressure | 250 PSIG |
| Output range | 0 to 30 PSIG (Adjustable) |
| Air Consumption | <6 SCFH |
| Flow Rate | 20 SCFM at 100 PSIG output |
| Filter | Removes particles 40 microns or greater |
| Port Size | 1/4’’ NPT |
| Housing Material | Cast Aluminum |
| Mounting | Side, pipe, panel or through body |
| Ambient Temperature | -20°F to 160°F |
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Typical Applications
The TA987 Air Filter/Regulator is recommended for filtering and regulating the pressure of plant compressed air, and for delivering clean, dry air at the proper pressure to pneumatic control devices. Supply air enters the inlet port, passes through the filtering element, and exits through the reducing valve to the outlet port. The filtering element removes particles as small as 40 microns. A drip well is provided for the accumulation of oil and water and a drain cock is included to allow purging of the unit. The filtering element is readily accessible for cleaning by removal of the drip well bowl. The maximum allowable supply pressure to TA987 Air Filter/Regulator is 250 PSIG. Improper application may cause failure of the regulator, resulting in possible personal injury or property damage.
Control Loop Accessories
Electronic Temp. Sensor
Specifications
| Model | TJD, TKD, TDD, TMD |
| Hot Junction | T/C: Ungrounded
RTD: Platinum, 3-Wire |
| Stem | 316 stainless steel, 1/4’’ diameter |
| Insulation | Ceramic |
| Head | Cast aluminum, polypropylene or stainless steel |
| Process Connection | 1/2’’ NPT welded, or spring loaded |
| Conduit Connection | 3/4’’ NPT Female |
| Temperature Range: Type J | 32° to 1382°F |
| Temperature Range: Type K | 32° to 2282°F |
| Temperature Range: Type D | -50° to 700°F |
| Temperature Range: Type M | -50° to 700°F |
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Typical Applications
The Watson McDaniel Connection Head is available with both Type J and Type K Thermocouples, as well as RTD sensors. The weatherproof head provides a conduit connection and is available in cast aluminum (screw cover), polypropylene (flip cover) and stainless steel (screw cover). The stem is either welded directly to the 1/2” NPT threaded connection or is spring-loaded to provide maximum sensitivity. The spring-loaded stem must always be installed in a thermowell
Control Loop Accessories
TR890 Series Electronic PID Controller
Specifications
| Model | TR890 Series |
| Case Material | Polyphenylene Oxide (PPO) |
| Ambient Temperature | 14°F to 122°F |
| Accuracy | ±0.3% |
| Control Output
– Current
– Contact
– SSR Drive Voltage
– Voltage |
4-20 mA (load resistance: 600 Ω maximum)
Proportional cycle, 1-120 sec.
Proportional cycle, 1-120 sec.
0 – 10 VDC |
| Power Requirements
– Supply Voltage
– Consumption |
100-240 VAC, 50/60 Hz or 24 VAC/VDC 50/60 Hz
100-240 VAC, 15VA 24 VDC, 8W 24 VAC, 9VA |
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Typical Applications
An electronic sensor (thermocouple, RTD or transmitter) installed at the measurement location continuously sends an input signal to the controller. At set intervals, the controller compares this signal to a predefined set point. If the input signal deviates from the set point, the controller sends a corrective electric output signal to the control element. This electric signal must be converted to a pneumatic signal when used with an air operated valve, such as a Watson McDaniel HB Series Control Valve. The conversion can be made using a Watson McDaniel TA901 I/P Transducer, which converts a 4 to 20 mA electric signal to a 3 to 15 PSI air signal. As an option, a Valve Positioner such as the Watson McDaniel CA2000 may be used to send an air signal to the Control Valve. These Positioners can be controlled with a 3-15 psi air signal from a Pneumatic Controller or a 4-20 mA signal from a PID Controller.