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Rotary Trip Valves

All three of the QuickTrip’s trip valves are spring return, two position rotary valves. When any of the

hydraulic valves is in its closed position, the ports in the valve are blocked preventing hydraulic flow

through the valve. As a valve rotates to the tripped position, the ports open and the trip header pressure

is connected to either the drain, or the inlet ports of another one of the valves. The combined action of

the three valves results in trip header pressure being connected to drain only when 2 or 3 valves are

tripped.

If the unit detects any shutdown condition or loss of power occurs, the trip valve return springs will force

the valves to the fail-safe / tripped position.

Electric Valve Actuators

The QuickTrip uses a set of three unique rotary solenoids called limited angle torquers (LAT). The

permanent magnet rotor is directly coupled to the trip valve.

The position of the valves is sensed by two limit switches present on each of the electrical modules.

These limit switches are located on both the closed and tripped positions of the valves, allowing the user

to easily determine the position of each valve.

Chemically Resistant Versions

For steam turbine applications where lube oil contains harsh chemical contaminants (ammonia, hydrogen

sulfide, etc.), a chemically resistant version of the QuickTrip has been developed. Chemically resistant

versions feature best-in-class seals in all wetted locations within the trip block assembly. Chemically

resistant versions provide an optimal solution for extreme chemical resistance while still maintaining

QuickTrip operating pressure and temperature ranges. Please contact Woodward for available models

and information regarding chemical resistance for specific applications.

Electric Valve Actuators

The QuickTrip uses a set of three unique rotary solenoids called limited angle torquers (LAT). The

permanent magnet rotor is directly coupled to the trip valve.

The position of the valves is sensed by two limit switches present on each of the electrical modules.

These limit switches are located on both the closed and tripped positions of the valves, allowing the user

to easily determine the position of each valve.

Electronic Driver Modules (PCB)

The printed circuit boards (PCB) are mounted on of the top of each valve module. The PCB(s) performs

the following tasks:

• Trip demand input

• Dual redundant power inputs

• Valve position feedback discrete outputs

• Visual valve position indication

Discrete outputs are provided for position feedback indication of each valve module. Within each valve

module, there are also four LEDs that indicate the current condition of the module as well as power

supply health. These LEDs are viewable through the module covers’ transparent sight window.

Redundancy/Availability

Designed for use in critical gas and steam turbine applications where turbine up time is important, the

QuickTrip uses three isolated solenoid valves designed to be driven by a triple modular redundant 2-out

of-3 voting based safety logic solver. Each isolated solenoid valve uses redundant power supply inputs to

increase both system reliability and availability. Note: only one power source is required to

power/energize each of the isolated solenoid valves.

On-Line Repairable

The QuickTrip’s modular design allows independent repair/replacement of each valve’s solenoid,

electrical module, and associated power supplies and wiring to increase both system reliability and

availability. Note: only one power source is required to power/energize each of the isolated

solenoid valves.

Each valve solenoid accepts power for one or two (redundant) power sources and has the following

status indications to assist operators with understanding the status and health of each valve.

• Valve Open—Local LED (red)

• Valve Open—Limit Switch

• Valve Closed—Local LED (green)

• Valve Closed—Limit Switch

• Power Supply #1 Healthy—Local LED (blue)

• Power Supply #2 Healthy—Local LED (blue)

Valve Status (local & remote)

Each valve solenoid accepts power for one or two (redundant) power sources and has the following

status indications to assist operators with understanding the status and health of each valve.

• Valve Open—Local LED (red)

• Valve Open—Limit Switch

• Valve Closed—Local LED (green)

• Valve Closed—Limit Switch

• Power Supply #1 Healthy—Local LED (blue)

• Power Supply #2 Healthy—Local LED (blue)

Redundancy/Availability

Designed for use in critical gas and steam turbine applications where turbine up time is important, the

QuickTrip uses three isolated solenoid valves designed to be driven by a triple modular redundant 2-out

of-3 voting based safety logic solver. Each isolated solenoid valve uses redundant power supply inputs to

increase both system reliability and availability. Note: only one power source is required to

power/energize each of the isolated solenoid valves.

On-Line Repairable

The QuickTrip’s modular design allows independent repair/replacement of each valve’s solenoid,

electrical module, and associated power supplies and wiring to increase both system reliability and

availability. Note: only one power source is required to power/energize each of the isolated

solenoid valves.

The QuickTrip is specifically designed for gas and steam turbine applications where turbine lube oil is

also used to power the hydraulic turbine control valve actuator(s). Gas and steam turbine applications can

be extremely challenging for hydraulic trip block assemblies as dirt, metal shavings, water, and other

contaminants are common in such oil systems. Also, due to the high temperatures at which turbines

operate, turbine oil breakdown is common, resulting in the creation of a sludge-type substance and the

varnishing of internal system components. However, the QuickTrip is designed to operate reliably within

such challenging applications. Its corrosion-resistant materials, rotary valve design, and self-cleaning

ports allow it to operate in such applications without experiencing undesirable sticking or dragging.

In the past, older style trip block assemblies utilized internal orifices and pressure gauges to verify

solenoid valve operation, causing many maintenance problems when applied in turbine lube-oil-powered

trip systems. Since the QuickTrip does not utilize problematic orifices or pressure gauges, maintenance is

reduced, and system reliability improved.

This trip block assembly is housed in a fully integrated package, which includes three patented dirt

tolerant rotary trip valves. These valves are connected to provide redundant two-out-of-three based

voting to ensure that a failure of any one component (electronics module, valve, wiring, connector, etc.)

does not result in a nuisance trip condition. The QuickTrip’s modular design also allows users to replace

critical components (electrical module, solenoid, wiring, etc.) while the turbine is operating on-line.

Designed to quickly and reliably bleed off trip oil header pressure, at least two of the QuickTrip’s three

rotary solenoid valves must be de-energized to open a bleed path from the trip oil header to system

drain.

The QuickTrip accepts one or two (redundant) 24 VDC power sources to power each solenoid, and uses

three independent discrete input shutdown commands from a safety logic solver like the Woodward

ProTechTPS (independent voted models) to test and control each solenoid valve.

Because gas and steam turbines are often used in hazardous locations where flammable gases may be

present, the QuickTrip is designed to be mounted next to the turbine and is certified for use in Zone-1 or

Zone-2 (Class 1 or Class 2) hazardous locations.

When packaged with a Woodward ProTechTPS safety logic solver, the ProTechTPS performs the

required routine safety system diagnostic tests to verify unit operation while the turbine is on-line. The

proof test trip time response monitoring and logging ensures the total turbine safety system can respond

fast enough to safely shutdown the turbine.

The total installed cost for this fully integrated trip block assembly is low because it has been completely

assembled and tested at the factory. This greatly reduces OEM and end-user fabrication time, installation

time, and testing time.

The QuickTrip’s robust design (corrosion resistant materials, three independent moving rotary valves, and

self-cleaning port design) makes it optimal for challenging applications where dirty or contaminated oil

may be present.

The QuickTrip is certified for use in IEC61508 based turbine safety systems, and when paired with the

Woodward ProTechTPS, can be applied into systems that require a “Safety Integrity Level – 3” rating

or below.

Designed for use in new or retrofit turbine packages, the QuickTrip’s compact package size allows it to be

located near the turbine and trip & throttle valve, minimizing trip header piping and related system

delays.

Each trip leg includes bright position indication LEDs (run & trip), allowing turbine operators to quickly

verify system status locally near the turbine, as well as integrated limit switches for safety system and

plant DCS status and health validation.

The QuickTrip is an IEC61508 safety certified electro-hydraulic trip block assembly designed for use in

gas or steam turbine shutdown systems for quick and reliable dumping of the turbine’s trip oil header.

This trip block assembly’s 2-out of-3 voting design provides users with a high level of system reliability as

well as compliance with industry standards like API-670. API-612. and API-611.

Introduction

The QuickTrip trip block assembly is designed for use in gas or steam turbine shutdown systems for quick

and reliable dumping of the turbine’s trip oil header. This integrated trip block assembly is intended for

use on mechanical-drive or generator-drive gas or steam turbines that use low-pressure (up to 34.5 bar /

500 psi) hydraulic trip oil headers.

The QuickTrip’s fault tolerant design makes it ideal for critical gas or steam turbine applications, where

turbine up-time and availability are essential. The trip block assembly’s 2-out-of-3 voting design provides

users with a very high level of system reliability as well as compliance with industry standard API-670.

This trip block assembly is designed to allow turbine controls and/or turbine safety systems to quickly

dump (bleed off) hydraulic header pressure during emergency trip or normal trip conditions. When

applied in conjunction with Woodward’s ProTechTPS logic solver, the QuickTrip allows users to

independently test each trip leg to verify operation and trip time. API-670 5th edition requires that all

components except for the final element (trip valve) shall be routinely tested while the turbine is in

operation.

With the use of trip solenoids, which respond in less than 50 milliseconds, the QuickTrip is designed for

gas or steam turbine trip systems where it is imperative that the entire trip system shut the system trip

valve as quickly as possible.

As a leader in horizontal stabilizer trim actuation, Woodward equips many civil and military programs.

Our HSTA systems enable to keep the aircraft’s attitude stable, by minimizing aerodynamic forces and

reducing drag.

Key Features

High performance and reliability for a safer flight

Balance of aerodynamic forces for a stable flight attitude

Reduction of the pilot workload and fuel consumption to fly more efficiently

Keep the Right Attitude

During the flight, the HSTA controls the pitch of the aircraft,

while minimizing the pilot workload and fuel consumption, to fly more efficiently.

According to the weight, pressures and center of gravity of the plane,

the flight control computer sends order to the HSTA via its electronic control

unit to adjust the angular positioning of the horizontal stabilizer.

Features and Benefits

Valve assembly features an on-board electronic controller module for ease of system packaging and

installation Self-cleaning, shear-type metering action keeps the metering port free from

performance-limiting deposits of gas condensates, contaminants, and system debris

Utilizes a single moving part with a fuel-metering element, actuator rotor,

and position feedback resolver mounted on a single solid-piece shaft

Product Variants

GS16:

• Conduit Entry Driver

• 2 Inch ANSI RF Flange

• 24 VDC Input Voltage

GS16DR:

• Connectorized and Required DVP

• 2 Inch ANSI RF Flange

• 90-150 VDC Input Voltage

Product Specifications GS16

Maximum Gas Supply Pressure:

• 750 psig (5170 kPa)

Fuel Temperature:

• -40 to +200 degrees Fahrenheit (-40 to +93 degrees Celsius) – aluminum body

Ambient Temperature:

• -40 to +200 degrees Fahrenheit (-40 to +93 degrees Celsius)