01489 570737

BA46 Continuous Blowdown Valve Flanged DN20 PN40

Excl. VAT: £1,646.26
Incl. VAT: £1,975.51
Brand: Gestra
Product Code: GES-BA46DN20
Quantity:

Gestra BA46 Continuous Blowdown Valve Flanged DN20 PN40
Continual evaporation in the steam generating unit increases the dissolved solids content of the boiler water. If this is not kept to a low level, sediment and scale builds up throughout the steam system.

Due to the continuous evaporation process in the steam boiler the density and hence the TDS (= Total Dissolved Solids) concentration of the boiler water is increased. The TDS level must remain within the limits specified by the boiler manufacturer and applicable guidelines. For this purpose a certain amount of boiler water (= boiler blowdown) is discharged continuously or periodically. The continuous blowdown valves BA... and BAE... feature specially designed and wear resistant nozzle stems that enter concentrically into a system of expansion chambers which are arranged one after the other, making the valve well suited for the continuous discharge of boiler blowdown at very high differential pressures. The continuous blowdown valves BA... and BAE... are suitable for operation in steam boiler plants according to TRD 604, EN 12952 and EN 12953

  • BA46 DN20 PN40, manually operated

Function
The continuous blowdown valve BA 46, BA 47 is moved to its control position by means of the control lever. Use the scale on the control lever to adjust the required amount of boiler blowdown. The required amount of boiler blowdown is calculated with the aid of a formula or read off on a nomogram. The continuous blowdown valve BAE 46..., BAE 47 is motored to its control position by means of the actuator EF... The actuator is activated by the GESTRA conductivity controller KS 90 working in conjunction with the GESTRA conductivity electrode LRGT 1... or the conductivity controller LRR 1-5x in combination with the GESTRA conductivity electrode LRG/T 1... or the conductivity controller LRR 1-40 in conjunction with the conductivity electrode LRG 16...-40.

The actuator opens or closes the continuous blowdown valve as a function of the required amount of boiler blowdown and the desired operating position, at which - independent of the actual electrical conductivity of the boiler water - a freely selectable basic amount can be discharged by the BAE 46..., BAE 47... The valve positions OPEN and CLOSED are limited by the cam-operated switch located in the actuator, the OPERATING POSITION is variably adjustable by means of an operating cam or a feedback potentiometer. The power flow towards the closing direction is transmitted via a coupling with integrated torsion spring. The coupling permits the actuator to travel a little bit further when the nozzle stem is pressed into the valve seat.

The conductivity of the boiler water is monitored by the equipment combination consisting of a conductivity electrode and a conductivity controller. The continuous evaporation process in the steam boiler increases the boiler water density and, consequently, the TDS level, causing the conductivity of the boiler water to rise. Once the set limit is reached, the actuator receives an opening signal from the conductivity controller as a function of the deviation from the conductivity setpoint. When the adjusted conductivity setpoint is attained, the actuator closes the continuous blowdown valve or returns to the adjusted operating position. The valve positions CLOSED and OPEN are limited by the cam-operated switch located in the actuator, the OPERATING POSITION is variably adjustable by means of an operating cam or a feedback potentiometer.

Gestra BA46 Continuous Blowdown Valve Flanged DN20 PN40
Continual evaporation in the steam-generating unit increases the dissolved solids content of the boiler water. If a low level is not maintained, sediment and scale build up throughout the steam system.

Due to the continuous evaporation process in the steam boiler, the density and hence the TDS (= Total Dissolved Solids) concentration of the boiler water increases. The TDS level must remain within limits specified by the boiler manufacturer and applicable guidelines. For this purpose, boiler water (= boiler blowdown) is discharged continuously or periodically. The continuous blowdown valves BA... and BAE... feature specially designed wear-resistant nozzle stems that enter concentrically into a system of expansion chambers arranged one after the other, making the valve well-suited for the continuous discharge of boiler blowdown at very high differential pressures. The continuous blowdown valves BA... and BAE... are suitable for operation in steam boiler plants according to TRD 604, EN 12952 and EN 12953

  • BA46 DN20 PN40, manually operated

Function
The continuous blowdown valve BA 46 and BA 47 are moved to their control position using the control lever. Use the scale on the control lever to adjust the required amount of boiler blowdown. The amount of boiler blowdown is calculated with a formula or read off on a nomogram. The continuous blowdown valve BAE 46..., BAE 47 motors to its control position utilizing the actuator EF... The activation of the actuator occurs due to the GESTRA conductivity controller KS 90 working in conjunction with the GESTRA conductivity electrode LRGT 1... or the conductivity controller LRR 1-5x in combination with the GESTRA conductivity electrode LRG/T 1... or the conductivity controller LRR 1-40 in conjunction with the conductivity electrode LRG 16...-40.

The actuator opens or closes the continuous blowdown valve as a function of the required amount of boiler blowdown and the desired operating position, at which - independent of the actual electrical conductivity of the boiler water - a freely selectable basic amount can be discharged by the BAE 46..., BAE 47... The Cam-operated switch in the actuator controls the valve positions OPEN and CLOSED. The OPERATING POSITION is variably adjustable utilizing an operating cam or a feedback potentiometer. Power transmission towards the closing direction occurs via coupling with an integrated torsion spring. The coupling permits the actuator to travel further when the nozzle stem presses into the valve seat.

The equipment monitors the conductivity of the boiler water consisting of a conductivity electrode and a conductivity controller. The continuous evaporation process in the steam boiler increases the boiler water density and, consequently, the TDS level, causing the conductivity of the boiler water to rise. Once reaching the set limit, the actuator receives an opening signal from the conductivity controller as a function of the deviation from the conductivity setpoint. When attaining the adjusted conductivity setpoint, the actuator closes the continuous blowdown valve or returns to the adjusted operating position. The cam-operated switch in the actuator limits the Valve's CLOSED and OPEN states. The OPERATING POSITION is variably adjustable through an operating cam or a feedback potentiometer.

Datasheets

Follow us

Our Brands