ppnneeuu--ttrriipp®® - drakecontrols.com system designed for the protection of steam turbines ......

PNEU-TRIP® Product Brochure, Rev. 4 Drake Controls, LLC © 2016. All Rights Reserved

AApppplliiccaattiioonn Petroleum refineries and chemical plants utilize general purpose API 611 steam turbines to drive mechanical loads such as pumps, fans, blowers and compressors. Many of these turbines have obsolete and unreliable mechanical overspeed trip devices that pose safety risks to the facility and its personnel. A more reliable overspeed trip solution is now available exclusively from Drake Controls. It includes an electronic overspeed detection device and a pneumatic trip valve actuation system with partial stroke test capability.

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The Drake Controls PNEU-TRIP® is a state-of-the-art

safety system designed for the protection of steam turbines. Each system includes a SIL-certified pneumatic trip block and SIL capable pneumatic actuator. When coupled with a Woodward ProTech SX, GII or TPS electronic overspeed detection system, PNEU-TRIP provides the most advanced, safe, high speed and reliable turbine protection solution available.

The system features the patented Partial Stroke Test Device (PSTD) technology that employs a unique pneumatically engaged travel stop for partial stroke testing. While a typical pneumatic trip system falls short in exercising the emergency trip solenoid valves and introduces risk of tripping the turbine during partial stroke tests, the PNEU-TRIP performs a full force partial closure of the trip valve. This test verifies the integrity of each trip solenoid valve and pneumatic system components. If a turbine trip condition is detected during the test, the travel stop is immediately disengaged allowing to quickly and safely shut the turbine down. PNEU-TRIP components are designed to be fail-safe upon loss of electric or pneumatic power and are online replaceable in TMR configurations.

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The PNEU-TRIP linear trip valve system is mounted directly on the steam chest. PNEU-TRIP quarter-turn rotary valve system is supplied with a metal seated triple offset butterfly trip valve.

Each trip actuation system can be furnished either standalone or as a complete safety solution, integrated with a Woodward electronic overspeed detection device such as ProTech SX or ProTech TPS. PNEU-TRIP also seamlessly integrates with the existing overspeed detection system, such as the ProTech-GII.

Complete Turbine Safety Configurations Include: o PNEU-TRIP

® 212 – simplex logic solver with 1oo2-

voted trip solenoid system for safety-critical applications

o PNEU-TRIP® 332 – triple modular redundant logic

solver with 1oo2 voted trip solenoid system for safety-critical and API 670 compliant applications

o PNEU-TRIP® 333(TMR) - fully fault-tolerant solution with TMR logic solver and

2oo3-voted trip solenoid system for high availability safety applications

Complete Replacement of

Mechanical Overspeed Trip

Fast and Accurate

Pneumatic Actuation

Seamless Integration with

Woodward ProTech Turbine

Safety Systems

Overall Trip Cycle Time

< 150 Milliseconds

All SIL-rated Safety System

Components

Online Partial Stroke

Testing at Full Spring Force

Online Testable Trip

Solenoid Valves

Online Replaceable

Components (TMR Only)

Compact Manifold Holds

Redundant Trip SOVs and a

PST SOV

Fail-Safe and Fault-Tolerant

Configurations

Linear or Quarter-Turn

Actuation Solution Available

Pre-Configured & Tested,

Requires No Field Assembly

Or Configuration

No Turbine Disassembly

Or New OEM Components

Required

UL/CSA/FM Approved,

Class I, Div. I/II, Groups

A,B,C & D Electric

Components

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PPNNEEUU--TTRRIIPP®® 221122

System Component Description SIL Fault Tolerance Online

Test / Maintenance Safety Availability

Overspeed Detection and Test Logic Solver

ProTech SX (1oo1D) 2 0/1 (U/D) 0 No/No

Trip Solenoid System 1oo2 3 1 0 Yes/No

Actuator Linear or Rotary 3* N/A Yes/No

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PPNNEEUU--TTRRIIPP®® 333322



Overspeed Detection Logic Solver ProTech TPS(2oo3) 3 1 1 Yes/Yes

Trip Solenoid System 1oo2 3 1 0 Yes/No

Actuator Linear or Rotary 3* N/A N/A Yes/No

Test Logic Solver Built In TPS N/A N/A N/A Yes/Yes

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STEAM TURBINE

TRIP VALVE

GOVERNORVALVE

SE-C SE-D

STEAM

TRIP VALVE WITH PSTD PNEUMATIC ACTUATOR AND 1oo2 TRIP BLOCK

PRIMARY AND PST PISTON POSITION FEEDBACK

TRIP SOV OUTPUTS

PST SOV OUTPUT

2 x SPEED PROBES

PROTECH SX


PPNNEEUU--TTRRIIPP®® 333333((TTMMRR))



Overspeed Detection and Test Logic Solver

ProTech TPS (2oo3) 3 1 1 Yes/Yes

Trip Solenoid System 2oo3 3 1 1 Yes/Yes

Actuator Linear or Rotary 3* N/A N/A Yes/No

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PPNNEEUU--TTRRIIPP®® SSppeecciiffiiccaattiioonn Feature/Function

PNEU-TRIP 212

PNEU-TRIP 332

PNEU-TRIP 333 (TMR)

General

Trip Block Solenoid Redundancy Level / Voting Scheme 1/1oo2 1/1oo2 2/2oo3

Available For Both Linear and Rotary Trip Valves YES YES YES

Overall Trip Cycle Time <150 mSec <150 mSec <180 mSec

Online Partial Stroke Testing (PST) YES YES YES

Guaranteed Valve Maximum Travel During PST YES YES YES

Remote/Scheduled Partial Stroke Testing YES YES YES

Online Testable Actuator Components YES YES YES

Online Testable Redundant Trip Solenoid Valves YES YES YES

Online Maintenance NO Overspeed logic

solver only All System

Components

Seamless Integration with Woodward ProTech YES YES YES

API Compliance API 611 API 611,670 API 611,670

Solenoid Valve Safety Certification SIL3 SIL3 SIL3

Actuator Safety Certification Up to SIL3* Up to SIL3* Up to SIL3*

Zone 2/Class 1 Division 2 Hazardous Location Approvals All Components All Components All Components

Trip Block Operating Temperature Range -20 to +60°C -20 to +60°C -20 to +60°C

-4 to +140°F -4 to +140°F -4 to +140°F * Rotary SIL2/SIL3; Linear Certification Pending

PNEU-TRIP®

is a registered trademark of Drake Controls LLC.

ppnneeuu--ttrriipp®® - drakecontrols.com system designed for the protection of steam turbines ......

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