Linear Control Valve

Globe straight-way LTG4 Series Control Valves have the same body, bonnet and seat ring of LTG3 series. The main difference is the design of the plug which is balanced type and contoured shaped for the throttling function. The cage, provided with large windows, clamps the seat ring against the body and acts also as the integral guide of the plug. The trim is of quick change type for an easy maintenance. These valves combine the benefits of plug balancing and quick-change feature of LTG3 series with the simple and versatile construction of contoured plug which allows a wide selection of materials, coatings and flow characteristics. Also dirty, abrasive and very corrosive fluids can be successfully handled without the inconvenient sometime […]

TRV control valves series are especially designed for heat exchangers control where the flow rate of the heating fluid which enters the heat exchanger is changed by the temperature controller. As outlined in the sketches of Fig.1 and 2 both the two methods used or this process switch-off the flow rate into a by-pass line around the exchanger. In the layout of Fig.1 the valve is the diverting type TRV1 with one inlet and two outlets while in the arrangement of Fig 2 the valve is the mixing type TRV2 with two inlets from heat exchanger and by-pass. The use of the by-pass around the exchanger limits the changes of pressure in the main line with many benefits for the […]

Globe straight-way, single seat LTG1 and LTG2 series are very versatile control valves of general use for any applications under moderate p/T service conditions. LTG1 is the standard design with screwed seat ring while the LTG2 is the corresponding quick-change version with the same flow coefficients and pressure differentials capability. Due to their simple construction and to their large range of available materials these valves are suitable for a wide range of applications, such asr corrosive, dirty, sticking and slightly abrasive fluids. Angle-body LTA special design is also available with the same trims of LTG series. Main advantages: Excellent plug stability provided by heavy top guiding design Interchangeable low noise and anticavitation trim either for std or quick-change design Tight […]

Globe straight-way LTG3 series is a very versatile control valve for the main applications. Its high performance derives by using a balanced and cage-guided plug. LTG3 is particularly suitable for heavy duties and for any other application under most demanding service conditions. Due to their simple construction, to the large range of trim types and available materials, these valves are suitable for a wide range of applications, including also high temperature and corrosive fluids, severe low-noise requirements and sour service in accordance with NACE standard. Main advantages: High pressure drop capability with no practical limitations Improved plug stability due to large guiding areas Wide-range capability is allowed by a great number of reduced capacity trims Excellent noise attenuation with low-noise […]

PRDV control valve is a very efficient and compact equipment for steam conditioning either in turbine by-pass lines discharging to condenser or in cogeration processes (see included layout). Conditioning includes pressure reduction and integrated desuperheating devices. Pressure reduction is obtained through three stages, except in LP applications where two stages are adequate to provide good performance and noise limitation. The first stage is the throttling section where flow rate is adjusted by the change of plug position inside a drilled cage. The second stage is a fixed resistance performed by a drilled basket, which creates a backpressure on the seat in order to reduce its velocity head and the generated noise. The third stage has a patented cone-shaped special designed […]

RV631 control valves have their main application in boiler feedwater process, They are expressly designed for processes that require low pressure drops when the flow rate is high and the need to avoid cavitation when flow rate is small. The special design of its cage, splitted in 3 steps along the travel, allows the RV631 trim to meet these process requests. During the first travel section, in which high pressure drops might generate cavitation phenomena, the process is controlled by a properly designed multistep cage, which causes the fluid to pass through six pressure reduction stages: in this way any vaporization is avoided. The last section has a final single stage cage with large flow passages which ensures the maximum […]