Woodward CPC-II Current Pressure Converter

Product Core Technology Highlights

Dirt Buster anti fouling technology: The output force of the actuator is increased by 4 times, and it can reduce or even eliminate hydraulic filters and reduce the maintenance workload of filter elements through 40 μ m particle impurities.

Silt Buster (patent pending) self-cleaning technology for sludge: automatically removes oil sludge accumulation, the cleaning process does not interfere with the normal control of the unit, and does not damage the integrity of operation.

Advanced control algorithms and improved diagnostic functions; Support optimal configuration of redundant systems.

The installation base is fully compatible with the old CPC and can be directly replaced in place; It can also be adapted for upgrading the Voith E360 I/H converter.

The output pressure is stable, and the pressure noise is much lower than that of traditional I/H converters, reducing the wear of servo mechanisms; Excellent step response, disturbance free, high-precision, and bumpless switching in gate control.

Equipped with PC service debugging tools, supporting performance trend recording, maintaining control stability under unit disturbance conditions, reducing process overshoot/undershoot, and improving unit availability.

Comparison Table of Traditional I/H (CPC/Voith E360 I/H) Functions

Function CPC-II Old CPC Voith E360 I/H

Dirty oil resistant particles ✔   ✔   ✔

Anti oil sludge siltation Silk buster ✔  — —

Valve linear compensation ✔   ✔   ✔

Corrosion pollution tolerance ✔   ✔   ❌

Sticky and stuck port compensation ✔   ✔  —

Redundant pressure set point input ✔   ✔   ✔

Redundant pressure sensor input ✔   ✔   ✔

External pressure sensor interface ✔   ✔   ✔

External oil cylinder position sensor interface ✔   ✔   ✔

Internal health status monitoring of equipment ✔   ✔   ✔

Manual stroke operation ✔   ✔   ❌

Isolation of input and output ✔   ✔   ✔

Performance Trend Recording Tool ✔   ✔  —

Adjustable performance/stability parameters ✔   ❌  —

CPC-II supports higher inlet pressures up to 25 bar.

Upgrade and renovation plan

Old CPC upgrade: The installation base and hydraulic oil interface of CPC-II are fully compatible with the old CPC, and can be directly replaced in situ without the need to modify the base and hydraulic manifold block. Refer to product specification 03352 for complete dimensions.

Voith E360 I/H retrofit: A separate adapter kit needs to be ordered, order number 8928-7240.

Comparison Table of Old Models and CPC-II Replacement Models

The original model’s explosion-proof zone level control pressure range has been upgraded, and the CPC-II ordering number has been updated

8901-455, 8901-457, 8901-459 Class I Div2 0-10 bar 9907-1200

9907-1102, 9907-1106 Class I Div2 0-25 bar 9907-1198

9907-046, 9907-477 Class I Div1 0-10 bar 9907-1199

9907-802, 9907-803, 9907-1100, 9907-1103 ATEX Zone1/Zone2 0-25 bar 9907-1197

Key points for performance comparison

Traditional I/H converters exhibit significant pressure noise, which accelerates the wear of servo components; Simultaneously, excessive damping results in slow dynamic response. CPC-II has smooth and stable output pressure, as well as fast and accurate step response. The servo position of the turbine control valve approaches the ideal step curve, reducing servo wear, minimizing process overshoot, and improving the stability of the unit operation.