Technical Specifications:

• Nominal Pipe Size: 30 mm (1.2 inches, DN30)
• Valve Type: 3-way L-port or T-port ball valve
• Actuator Type: Electric actuator with built-in positioner (A41252 configuration)
• Operating Pressure: Up to 2.1 MPa (depending on temperature and material)
• Operating Temperature Range: -29°C to +200°C (EPDM seal); -40°C to +250°C (PTFE seal)
• Cv Value: Approximately 10 (varies by port configuration)
• Leakage Rate: ANSI/FCI 70-2 Class IV (bubble-tight shutoff)
• Actuator Torque: 15 N·m (standard for DN30)
• Actuator Travel Time: Approximately 15 seconds for 90° rotation (full stroke)
• Control Signal: 4–20 mA DC or 0–10 V DC (with positioner)
• Power Supply: AC 100 V to 240 V or DC 24 V (depends on actuator model)
• Protection Rating: IP67 (actuator); IP68 (cable gland)

Material Composition:

• Valve Body: SUS316 stainless steel (cast or forged)
• Ball: SUS316 stainless steel with PTFE seat
• Stem: SUS316 stainless steel, blow-out proof design
• Packing: PTFE with graphite filler
• Seat: PTFE (RPTFE) or PPL
• Actuator Housing: Aluminum alloy (die-cast), epoxy coated
• Gear Train: Stainless steel gears with grease lubrication

Structural Features:

• Flanged end connections: JIS 10K/16K/20K, ANSI 150, DIN PN16
• Direct mounting to electric actuator (ISO 5211 compliant)
• Built-in positioner with 4–20 mA input and feedback (LVDT)
• Manual override handle for emergency operation
• Anti-static device: spring-loaded stem-to-body contact

Working Principle:
A 90° rotation of the ball diverts or combines flow between three ports. The electric actuator receives a 4–20 mA control signal, which the positioner converts to proportional actuator rotation via an internal servo motor. The positioner uses an LVDT (Linear Variable Differential Transformer) feedback sensor to precisely control the valve position (0%, 25%, 50%, 75%, 100% open). In case of power failure, the valve holds its last position (fail-in-place) or returns to a preset position depending on the actuator spring configuration.

Advantages & Highlights:

• Electric actuator with positioner provides precise modulating control (not just on/off)
• Quarter-turn operation with fast response time (~15 seconds full stroke)
• Built-in positioner eliminates the need for a separate positioner unit
• Manual override ensures operation during power failure
• Bubble-tight shutoff (Class IV) for critical process isolation

Applicable Industries:

• HVAC systems (chilled water, hot water mixing and diversion)
• Chemical process plants (reactor feed diversion)
• Food and beverage (CIP/SIP valve control)
• Pharmaceutical (sanitary process control)
• Power generation (auxiliary steam control)

Installation Requirements:

• Install with actuator in vertical upward position (for standard electric actuators)
• Provide AC 100–240 V or DC 24 V power supply to the actuator
• Mount positioner on actuator per ISA mounting pad (ISO 5211)
• Ensure adequate space for actuator stroke and manual override operation
• Connect 4–20 mA control signal with shielded twisted-pair cable

Usage Precautions:

• Do not exceed the maximum allowable pressure at the given temperature (refer to P-T chart)
• Calibrate the positioner after installation: set 4 mA = closed, 20 mA = fully open
• Do not use the valve for throttling service under high differential pressure — it is designed for on/off or diverting control
• Lubricate the actuator gear train annually with the specified grease
• Verify the fail-safe action (fail-close or fail-open) matches the process safety requirement

11. Yokogawa CP333D-S3

Product Name: Yokogawa CP333D Series Signal Converter / Isolator

Model Series: CP333D

Full Model Number: CP333D-S3

Product Introduction:
The CP333D-S3 is a signal converter and isolator from Yokogawa’s CP333D series, designed for industrial signal conditioning, isolation, and conversion in process control and instrumentation systems. It provides galvanic isolation between input and output to eliminate ground loops and noise.

Technical Specifications:

• Input Signal: 4–20 mA DC (2-wire loop powered)
• Output Signal: 4–20 mA DC (2-wire, loop powered)
• Isolation Voltage: 1,500 V DC (input to output to power)
• Accuracy: ±0.1% of span
• Response Time: ≤ 100 ms (typical)
• Power Supply: DC 24 V (±20%)
• Power Consumption: Maximum 2.5 W
• Operating Temperature: -10°C to +60°C
• Protection Rating: IP20 (DIN rail mount enclosure)
• Dimensions: 22.5 mm (W) × 115 mm (H) × 115 mm (D) (DIN rail mount module)
• Weight: Approximately 0.15 kg

Material Composition:

• Housing: ABS resin (UL94 V-0 rated), DIN rail clip: steel with zinc plating
• Terminal Blocks: Screw-type, phosphor bronze contacts, tin plated
• PCB: FR-4 glass epoxy, conformally coated
• Isolation Barrier: High-frequency transformer + optocoupler

Structural Features:

• DIN rail mounting (35 mm rail, TS-35/7.5 or TS-35/15)
• Screw-type terminal blocks on top for easy wiring
• LED indicator: Power ON (green), Alarm (red)
• Zero and span adjustment potentiometers accessible via front panel

Model Code Breakdown:

• CP333D: Signal converter/isolator series
• S3: Specific configuration (input: 4–20 mA; output: 4–20 mA; isolation: 1,500 V DC)

Working Principle:
The input 4–20 mA signal is converted to a proportional voltage by a precision shunt resistor. This voltage is then linearized and scaled by an operational amplifier circuit. The signal is transmitted across a high-frequency transformer isolation barrier (for analog isolation) and an optocoupler (for auxiliary power isolation). On the output side, the isolated signal is converted back to a 4–20 mA current using a voltage-to-current converter (V/I converter) with a precision current loop transmitter circuit. This provides complete galvanic isolation between input, output, and power supply, eliminating ground loop currents and common-mode noise.

Advantages & Highlights:

• 1,500 V DC isolation eliminates ground loop problems in multi-point systems
• ±0.1% accuracy maintains signal integrity over long cable runs
• DIN rail mountable — fits in any standard control cabinet
• Zero and span adjustment via front panel potentiometers — no external tools required
• Loop-powered on both input and output — minimal wiring required

Applicable Industries:

• Process control systems (DCS, PLC I/O isolation)
• Building automation (BMS signal isolation)
• Power plant instrumentation (turbine, boiler signal conditioning)
• Water and wastewater treatment (pump station remote monitoring)
• Industrial automation (4–20 mA signal extension over long distances)

Installation Requirements:

• Mount on DIN rail (TS-35/7.5 or TS-35/15) in a control cabinet
• Connect input signal wires to IN+ and IN- terminals (observe polarity: IN+ = red, IN- = blue)
• Connect output signal wires to OUT+ and OUT- terminals (observe polarity: OUT+ = red, OUT- = blue)
• Connect DC 24 V power to P+ and P- terminals
• Ensure the DIN rail is properly grounded to chassis ground

Usage Precautions:

• Do not exceed the maximum isolation voltage of 1,500 V DC — higher voltage will damage the isolation barrier
• Do not reverse the input polarity — it will cause output saturation and potential damage
• Verify zero and span calibration after installation: adjust zero pot with 4 mA input, adjust span pot with 20 mA input
• Do not operate in ambient temperatures exceeding +60°C — accuracy degrades above this limit
• For hazardous areas, use an appropriate Zener barrier or galvanic isolator rated for the zone classification (ATEX/IECEx)