Controller handles up to 250 DDC-100 field units.

Press Release Summary:

Limitorque Master Station II plug-and-play solution provides real-time status of field units through continuous cyclical polling. Touch panel provides network status, actuator status, and control of all actuators on network as well as valve emergency shutdown. Design includes built-in webserver with options for actuator control. Control unit is offered in rack enclosure, mountable enclosure, or standalone cabinet enclosure.

Original Press Release:

Flowserve Launches the Limitorque Master Station II

Plug-and-play control and diagnostic solution for up to 250 DDC-100 field units

(Dallas TX: September 9, 2003) Limitorque, a member of the Flowserve (NYSE:FLS) Flow Control Division and global leader in the design and manufacture of actuation solutions, announces the introduction of the Limitorque Master Station II - a next generation master station that is designed and manufactured by Limitorque specifically for use with the Limitorque line of DDC-100 field units.

The Limitorque Master Station II is a virtually maintenance-free, plug-and-play solution that provides complex control and diagnostics of Limitorque field units through a simple touch-panel operator interface. Designed for power, petrochemical, oil and gas, water and wastewater applications, the Master Station II supports all Limitorque DDC-100 field units including the MX, L120, and LY, and is a single-source controller for up to 250 (MOVs) actuators.

The new control unit offers optional standard rack enclosure, mountable enclosure or standalone cabinet enclosure. The user-friendly touch-panel operator interface permits configuration and control of a DDC-100 network with communication to host or DCS (Distribution Control System), and also enables password protection.

Optional hot stand-by configuration automatically assumes control on primary master failure or on command from the DCS or touch panel. The Master Station II, which provides real time status of field units through continuous cyclical polling, is configured for Modbus RTU and TCP/IP that is addressable with RS-232/485/422 and a 10/100 baseT.

The advanced Limitorque design offers a built-in webserver for ease of actuator and network diagnostics, with options for actuator control, including host control via the Master Station II, Modbus DCS port or Modbus TCP/IP connection. Direct control via the Master Station II touch panel provides network status, actuator status, and control of all actuators on network and valve emergency shutdown (ESD). The Master Station II is available in standard 24 VDC and 100-240 VAC, requires no batteries, and is backed by Flowserve Limitorque quality support and service.

A high-resolution photo of the Limitorque Master Station II is available for download by clicking here.

About Flowserve Limitorque

Flowserve Limtorque is the global leader in the design and production of actuation systems. Limitorque is an operating unit of Flowserve Corporation (NYSE:FLS), a $2+ billion-a-year company strongly focused on automation and support of the valve industry and the world's premier provider of flow management services. Flowserve Limitorque has evolved over 70 years since its strategic introduction of a "torque-limiting" design that changed an industry. Flowserve Limitorque offers automation solutions that produce cost savings from field devices such as electric valve actuators; greater operating efficiencies from control room performance sequencing, interlocking, and continuous process optimization; and competitive advantages derived from increased management visibility and financial reporting databases and networks. For more information on the Limitorque Master Station II, please contact Brian Daugherty, product manager, by telephone at (434) 528-4400 or by e-mail Visit Flowserve Limitorque on the web at

About Flowserve Corporation

Flowserve Corporation (NYSE:FLS) is one of the world's leading providers of industrial flow management services. Operating in 34 countries, the company produces engineered and industrial pumps for the process industries, precision mechanical seals, automated and manual quarter-turn valves, control valves and valve actuators, and provides a range of related flow management services. More information about Flowserve can be obtained by visiting the company's website at

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