Industrial Valves by Gestra

As a major distributor for Gestra, Valutech has been supplying industrial valves - continuous and intermittent boiler blowdown valves and check valves for the boiler and fluid control industries.

Boiler Blowdown Valves
Since all boiler feedwater contains some solid impurities due to the evaporation process, i.e., the boiler-water density (TDS level) increases, the boiler-water TDS level or conductivity has to be kept within permissible limits. Gestra provides two possible solutions or operations which together guarantee optimum boiler safety and trouble-free operation.

Continuous Blowdown
The most effective blowdown operation (dissolved-solids removal) is obtained by a continuous process so that the minimum quantity of water is discharged from the boiler. The Gestra continuous blowdown valves (Reactomats) type BA or BAE were specially designed for this purpose. These robust industrial valves are of compact design and easy to operate. The essential part of the valve is the GESTRA multi-stage nozzle or - for larger blowdown rates - the radial stage nozzle serving as discharge and control unit. The nozzle allows the water withdrawn from the boiler to expand and flash gradually across each successive orifice area and expansion chamber. The flashing effect reduces the blowdown velocity and virtually eliminates the risk of wire drawing. The noise level of the valves is therefore very low.

Intermittent Blowdown

If boiler feedwater is treated by a simple process slight amounts of alkaline earths penetrate into the boiler water (residual hardness) requiring resoftening in the boiler in the form of phosphates by ensuring a well-calculated phosphate surplus. The phosphates form a sludge layer on the heating surfaces and in the boiler bottom.

Sludge deposits will accumulate to form a dangerous insulating layer of scale on the heating surfaces and reduce the rate of heat transfer. It is therefore necessary to discharge the sludge at regular intervals i.e. to carry out intermittent blowdown.

Residual hardness complexation with polyacrylates in spite of its dispersing effect also requires intermittent blowdown. although hardening constituents are kept in suspension by the polyacrylates, after a prolonged period they are nevertheless precipitated in the boiler bottom. All sludge deposits are a risk for boiler safety and should therefore be removed by intermittent blowdown at regular intervals for periods of 1 to 3 seconds (or longer if preferred).

Check Valves by Gestra

As a major distributor for Gestra, Valutech has been providing check valves for the heat and process fluid control industry for well over a decade.

check valves The Gestra check-valve range includes gravity circulation checks, non-return valves, swing check valves and dual-plate check valves. All valves are water pattern and have extremely short overall lengths.

Due to these design features, these industrial valves offer the following advantages in comparison with conventional valves:

Compact design
Minimum weight
Installation in any plane
Low installation cost
Wide range of materials
Space-saving stock-keeping

Due to rarefined manufacturing technique and their excellent hydrodynamic properties Gestra check valves make a valuable contribution to the safe operation of industrial plants.

Gravity Check Valves Gravity circulation checks are used to prevent gravity circulation downstream of circulating pumps in heating and hot-water installations.

Applications for Gravity Circulation Check Valves

For sanitary and HVAC (heating, venting and air-conditioning) applications
For heating and hot-water systems, liquids, vapours and gases
Can be used as a vacuum breaker, as a pressure relief valve, or for air venting
For installation between two flanges

Applications for Non-Return Valves

For liquids, gases and vapours.
RK41 is particularly suitable for heating systems.
RK44 for sea water and drinking.

Call us today. Tel: 905.940.0961 or by Email: info@valutechinc.com

Valutech Inc. 70 Esna Park Drive, Unit 3, Markham, Ontario, Canada L3R 6E7
Tel: (905) 940-0961 ~ Fax: (905) 940-0983