Angle Pattern Single Stage and Multi stage Blowdown Valves


Blowdown Valves : Angle Pattern Single Stage and Multi stage design
The ACT x 83 Three Stage Angle Pattern Valve is Suitable for High Pressure Drain and Blow Down Service. Typical applications for this valve are Boiler Drum Continuous Blow Down and Turbine Drain Lines. These valves are designed for pressure drops as high as 200 bar.The Multistage Valve design integrates the advantages of a High Pressure Stop Valve Design and the Reliability of a High Pressure Reduction Valve. The Valve has a replaceable seat bush with stellite deposition at the seat. Slots in the seat bush and control plug are designed such that the spindle is guided throughout its travel by the seat bush eliminating the harmful effects of vibration. Velocities are restricted to 2-3 m/s inside the valve when used on hot water services. The valve yoke is provided with a roller thrust bearing for ease of operation. High density pure graphite rings and roller burnishing of spindle and stuffing box bore, eliminate leakage through gland packing. Valve operation can be done by a hand wheel or with an electrical actuator without major modification to the yoke.

The ACT x 85 Three Stage Angle Pattern Valve is Suitable for High Pressure Intermittent Blow Down Service. Typical applications for this valve are Boiler Drum Intermittent Blow Down Lines. These valves are designed for pressure drops as high as 200 bar.

The EKINx11 Angle Pattern Blowdown Valve is designed for High Pressure Blowdown service. Typical applications for this valve are Boiler Drum Continuous and Intermittent Blowdown Lines. The Angle Pattern Blowdown Valve design combines the advantages of high leak tightness of a High Pressure Stop valve and a throttle valve handling high pressure drop, at the same time. The valve has a slotted and stellited plug which helps to reduce pressure in a Single Stage, thus, protecting the seat from effects of Cavitation and flashing and therefore enhances seat life. The Control plug and Seat are stellited to resist erosion and wear. The spindle and plug are manufactured from a single bar forging. Damage to seat by entrapped solid can be avoided. High density pure graphite rings and roller burnishing ( mirror finish)of Spindle and stuffing box bore ,reduce damage to the gland packing rings and helps reduce possible leakage through gland packing. The Yoke bush is provided with Roller Thrust Bearing for ease of operation with Handwheel. The Valve can be operated by a hand wheel or with an electrical actuator. Valve construction complies to Indian Boiler Regulation requirements. Valves offered in Butt Weld, Socket weld end. Flanged end connection are also offered against request.
Benefits Specifications Technical Documents
Advantages due to Unique Feature:

•    Single piece  stem and plug assembly: No vibration of plug when the valve is kept semi open position. Cracking of Stellited seat due to High frequency vibration of plug when handling high pressure drop across valve seat is a common occurrence. Can be avoided by considering  this feature.               
•    Non Rotating along with Single Piece Stem and Plug Design feature ensures that the plug does not rotate when it sits on the valve seats. It also prevents damage to seat due to entrapped solid such as pipe scales or entrapped solid when the valve operator puts excess effort on handwheel to ensure tightness at seat.
•    Non Rising Hand wheel is ideal for use in areas where space between pipes is limited.
•    Roller Burnishing in Gland packing section gives a mirror finish to the spindle and helps reduce ware and tare of the gland packing. Effort required to operate the valve reduces due to reduced friction at the gland packing section due to this feature.
•    Control Cone feature (SN 46) with slots machined as per the valve discharge capacity. Valve plug specially designed such that there is no real flow till the plug seating area has move a minimum of 10% of the total lift away from the valve seat. This helps to separate the seating area from the throttling of High pressure reduction area. As a result the harmful effects of  cavitation and flashing do not affect the seating area of the valve enhancing the seat life .
•    Replaceable seat bush feature reduces maintenance down time  cost  considerably.
•    Need to only replace seat bush or valve stem  and  any other critically damaged part instead of replacing the full valve .