CCI - Control Components Inc.

Press Releases - Power

CCI Receives Order to Supply Turbine Bypass System and DRAG® Valves for Keyspan’s Ravenswood Cogeneration Project

Rancho Santa Margarita, CA – Severe service control valve manufacturer CCI received an order from Stone and Webster to supply a turbine bypass system to the Ravenswood combined cycle power plant using an air-cooled condenser. The plant is a 250 MW unit with a triple-pressure steam system. The plant is located in Long Island City, New York, just north of the Queensboro bridge on the East River. The air-cooled condenser is mounted on the roof of the power plant, with the turbine and bypass system ducting running up the side of the building.

The order consists of an HP bypass system, which incorporates CCI’s DRAG® technology design to eliminate the problems of noise, erosion, and vibration. This is made possible through the advanced design of the DRAG® disk stack that controls fluid velocities by forcing the fluid through a series of right-angle turns. These turns have been scientifically calculated to achieve low fluid velocities consistent with Ravenswood’s needs. The system is also supplied with a BTG DAMD desuperheater to reduce the enthalpy of the steam to 1155 BTU/lb for discharging the steam to the condenser. Instead of providing a traditional dump tube to discharge steam into the condenser ducting, CCI will supply a multi-stage DRAG® resistor mounted inside the duct on the side of the buildingfor discharging the steam into the ducting . The DRAG® resistor will eliminate one of the primary sources of noise in the bypass to condenser systems.

CCI will also supply an IP bypass system that includes a CCI DRAG® angle valve measuring 12 in. x 16 in. (300 mm x 400 mm) and an LP turbine bypass system that includes an angle valve that measures 12 in. x 12 in. (300 mm x 300 mm). IP and LP bypass systems will include low-noise drilled-holed dump tubes in order to meet the customer’s very low noise requirements. BTG DAMD and DAO desuperheaters are used to reduce the enthalpy to required levels.

With conventional bypass systems installed on air-cooled condenser units, it is not usual to have near field noise levels of 110dBA near the condenser ducting and far field noise levels of 70 dBA at 4000 feet from the plant. CCI has designed the system to be able to meet the Ravenswood 55 dBA noise level requirement within 1000 feet from the plant to allow nighttime operation of the bypass system.

By supplying this unique turbine bypass system with DRAG® valves, BTG desuperheaters, DRAG® resistors and low-noise dump tubes, CCI is helping to ensure that Ravenswood will have flexible operating hour, and short and reliable startup times.

CCI is the world's leading manufacturer of severe service control valves and hydraulic and pneumatic actuators for coal, oil, gas, and nuclear power plants; the oil and gas-producing and hydrocarbon industries; and pulp and paper plants worldwide. With headquarters in Rancho Santa Margarita, California, and offices worldwide, CCI also operates major design and manufacturing facilities in Winterthur, Switzerland; Saffle, Sweden; Vienna, Austria; Osaka, Japan; and Kyunggi-Do, South Korea.

DRAG® is a registered trademark of CCI, Rancho Santa Margarita, California, USA.

Steam Conditioning VST-SE Valve Now Equipped with Class V Shutoff to Prevent Leakage While Providing High Rangeability and Noise Reduction

Rancho Santa Margarita, CA – CCI Sweden (formerly BTG Valves) announces the enhancement of its current VST-SE valve to now include Class V shutoff capabilities to prevent leakage in a wider range of steam conditioning applications.

The VST-SE is a multi-stage steam conditioning valve that combines the benefits of low noise and vibration levels with high rangeability, typically at least 50:1. VST-SE was designed to provide this improved rangeability even when a multi-stage pressure-reduction arrangement is required to minimize noise and vibration. All spraywater injection takes place after the final steam pressure reduction stage, avoiding the risk of erosion and cracking of valve body and internals.

The VST-SE also utilizes the inlet steam to atomize the cooling water. This steam atomization principle provides a cooling system whose performance is independent of the steam flow velocity at the water injection point. Thus it is insensitive to the downstream steam velocity from the water evaporation point of view. VST-SE has a unique patented design solution for control of the atomizing steam creating the high system rangeability.

The VST-SE is developed to be able to run parallel to extraction and back-pressure turbines under a wide range of conditions. The valve also provides excellent service in industrial and utility power plants for auxiliary steam.

CCI is the world's leading manufacturer of severe service control valves and hydraulic and pneumatic actuators for coal, oil, gas, and nuclear power plants; the oil and gas-producing and hydrocarbon industries; and pulp and paper plants worldwide. With headquarters in Rancho Santa Margarita, California, and offices worldwide, CCI also operates major design and manufacturing facilities in Winterthur, Switzerland; Saffle, Sweden; Vienna, Austria; Osaka, Japan; and Kyunggi-Do, South Korea.

CCI’s VLB Valve for Pressure Reducing with an Integrated Cooling System

Rancho Santa Margarita, CA – CCI Sweden (formerly BTG Valves) has further modified its VLB steam conditioning valve for use in high and/or low-pressure systems in the process industry. This design allows for continued startup and shutdown of different loops in the power plant with a minimal heat losses. It keeps the steam in balance with load requirements and handles abnormal conditions, such as load rejection, turbine, pump, or fan trips, which allows the system to return to normal operation with minimum delay.

The VLB valve is a pressure-reducing valve with an integrated cooling system with a steam flow throttled through a cage-type plug with multiple drilled holes. This provides the optimum characteristics for controlling the steam pressure. The pressure reduction continues in the outlet that is furnished with pressure-reducing pipes. The spraywater is injected through spring-loaded variable nozzles after final pressure reduction of the steam, providing an excellent spray pattern during the entire load range. This means no erosion problems with valve internals.

For combined cycle applications, the standard VLB valve is available with a balanced tight cage plug design with leakage less than Class V and a pilot plug reducing actuating force that allows pneumatic actuation. The tight cage plug design is standard for hydraulic-operated bypass valves used in conventional drum boiler applications. Both designs contain a drilled control cage that moves inside the prolonged valve bonnet. The bonnet has also a drilled part, which results in two variable pressure-reduction stages before the steam is expanded through the valve seat. This further reduces the risk for noise and vibration problems from the valve.

The VLB has been proven successful in installations for 25 years.

CCI Awarded Million-Dollar Order to Supply Upcoming Mesquite Power Station with Turbine Bypass Valves

Rancho Santa Margarita, CA – CCI has received a million-dollar order for the supply of turbine bypass valves for the upcoming construction of Sempra Energy Resources' Mesquite generating station. When completed, this 1200-MW combined cycle power plant will provide service for the growing Phoenix, Arizona, area in the U.S.

The large order includes CCI's high and low-pressure steam bypass and spraywater valves as well as hot reheat to condenser steam bypass and spraywater valves. The low-pressure valve is CCI’s LLP™ design, which is capable of delivering dependable Class V shutoff, fast response, and a reduction in temperature control in a complete and compact steam conditioning valve. Some of these designs will also incorporate DRAG® technology, which provides highly reliable valve performance and longer intervals between maintenance. Both the high-pressure and hot reheat bypass valves meet the tight shutoff requirements per MSS-SP-61 using a pressurized seat design. MSS-SP-61 tight shutoff completely eliminates the need for isolation valves, which means financial savings for the customer. DRAG® customized severe service control valves prevent noise, erosion, and cavitation by forcing process fluid to follow a tortuous path of right-angle turns through the trim, thus controlling damaging velocities.

CCI is the world's leading manufacturer of severe service control valves and hydraulic and pneumatic actuators for coal, oil, gas, and nuclear power plants; the oil and gas-producing and hydrocarbon industries; and pulp and paper plants worldwide. With headquarters in Rancho Santa Margarita, California, and offices worldwide, CCI also operates major design and manufacturing facilities in Winterthur, Switzerland; Saffle, Sweden; Vienna, Austria; Osaka, Japan; and Kyunggi-Do, South Korea.

DRAG® is a registered trademark of CCI, Rancho Santa Margarita, California, USA.