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PEC

PEC

Product catalog summary

Overview
The document provides detailed information on the High-Resolution Precision Electric Control Valve offered by DeZURIK, focusing on its digital control systems, synchronous control systems, and design features.

Digital Control Systems

Absolute Positioning: Utilizes a 14-bit absolute-encoder for 16,000 repeatable positions with an accuracy of 0.007%. A 12-bit resolver option offers 4,000 positions with 0.025% accuracy.
Step and Direction: Employs a 12-bit resolver for 4,000 positions with 0.025% accuracy, moving the valve plug one position per input signal pulse.
Time Duration: Provides 12-bit precision with a resolver for 4,000 positions and 0.025% accuracy, moving the valve plug proportionally to pulse duration.
Microcontroller: All systems offer closed-loop position control with backlash elimination and standard fault-condition messages.

Synchronous Control Systems

Synchronous Analog Control: Uses a closed-loop system with 4-20 mA feedback, achieving 0.1% positioning accuracy with 1,000 repeatable positions.
Drive Motors: AC synchronous motors for analog and time-duration systems, and DC stepping motors for digital systems, ensuring precision and reliability.
Synchronous Time-Duration Control: Offers mechanical setup for running times, providing up to 7,760 positions with resolver feedback accuracy of 0.025%.

Design Features

Flow-Capacity Ranges: Two trim packages available for varying flow requirements, with V-Port and straight concentric plug options.
Stainless Steel Valve Body: Constructed from 316 stainless steel, offering durability and a range of sizes.
NEMA IV Control Module: Provides protection and easy serviceability, with precision components and a PTFE seal.
Continuous Operation: Features non-contact plug operation for smooth performance and chemically inert bearings.
Manual Operation: Includes a fail-safe interlock switch and declutchable thumb-wheel for manual adjustments.
External Valve Position Indicator: Offers visual indication of valve plug position.

Applications
The valve is designed for critical control applications, such as basis weight and head box control, offering unmatched control accuracy with options for 1,000 to 16,000 positions.

Catalog excerpts

High-Resolution Precision Electric Control Valve >

Open the catalog to page 1

SPX PROCESS EQUIPMENTHIGH-RESOLUTION PRECISION ELECTRIC CONTROL VALVE > Absolute Positioning is the most precise High-Resolution Precision Electric Control Valve DeZURIK offers. With 14-bit absolute-encoder feedback, the valve provides 16,000 repeatable positions, accurate to within 0.007%. A 12-bit resolver is also available and provides 4000 repeatable positions. Positioning accuracy is within 0.025%. The digital valve controller compares the valve plug position signal to the serial input signal and drives the plug, in either the open or closed direction, to the desired position. Serial link...

Open the catalog to page 2

PEC

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Catalog excerpts

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