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Water Treatment 'TransPac' PAC Dosing Systems | | Powdered Activated Carbon (PAC) is often added to drinking water supplies to remove Pesticides (such as Metaldehyde), odour and taste to meet the current legislation requirements. Problem Traditionally PAC has been added into a batch dosing system incorporating mechanical agitators, tanks and slurry pumps. However, as PAC is only required at certain times of the year this can lead to unreliable operation because residual slurry left at the bottom of the mixing tanks can dry to form large solids and slurry can settle out within the dosing lines and pumps on shut-down. This can result in system blockages and costly maintenance at a time when PAC is needed. Solution Our 'TransPac' PAC dosing systems offer a reliable and simple method of producing PAC slurry on demand at varying powder flows to match the process requirements. TransPac PAC dosing systems are split into two distinct areas:- - Dry powder metering
- Mixing & slurry dosing
PAC dosing control is handled by the dry powder system and the Eductor system is used to mix and deliver the PAC slurry to the designated works discharge point.
| Interior View of Fully Containerised PAC Dosing Solution with Spiroflow Bulk Bag PAC feed option | 
Interior View of Fully Containerised PAC Dosing Solution with Spiroflow Bulk Bag PAC feed option |  Exterior View of Fully Containerised TransPAC Dosing Solution | Download our TransPac PAC dosing brochure here
See also Liquid Jet Solids Pumps in Fluid and Solids Handling
Send us your requirements using our Liquid Jet Solids Pump Enquiry Form. Visit our PAC Dosing Microsite - www.carbondosing.com |
| | Transvac has supplied thousands of units to the water treatment industry. Using liquid as the motive force Transvac Jet Pumps can accurately entrain, mix and dilute a secondary liquid, eliminating the need for mechanical dosing pumps and mixers. | PVCu Liquid Jet Pump
with plain spigot connections |
In operation a high velocity jet of pressurised liquid discharged from the motive nozzle produces a region of low pressure in the suction chamber that entrains the secondary liquid. The two streams then thoroughly mix in the throat before the resulting mixture flows through the diverging cone to regain some pressure in order to overcome system discharge heads. Advantages - Simple and reliable
- No moving parts
- In-line mixing
- Custom designed
- Materials to suit process
- No maintenance
| Liquid Jet Pump System for diluting sodium hypochlorite
on a power station cooling water plant |
| | Polypropylene Liquid Jet Pump with galvenised mild steel flanged connections |
| | Liquid Jet Pump with PTFE contact parts for diluting
sulphuric acid from 96% to 3% on a power plant |
| | Single units or complete skid mounted packaged systems are available, each unit is designed to specific process conditions. Standard materials of construction include rubber-lined, PVCu, PP, PTFE, PVFD, hastelloy, titanium, stainless steel and carbon steel. Connections included flanged, screwed, plain, hosetail and bauer. |
Download our Liquid Jet Pump brochure
See also Liquid Jet Pumps in Fluid and Solids Handling
Send us your requirements using our Liquid Jet Pump Enquiry Form. |
| | A versatile method of entraining, mixing and pumping solids into liquids. The Venturi principle offers many advantages over other types of high shear mixing equipment on the market. Robust and highly reliable with no moving parts to wear, the units are virtually maintenance free. Available in either stationary, portable or mobile models the custom designed Liquid Jet Solids Pump (LSP) units can be supplied as individual items or complete skid mounted systems including motive pump, valves etc. Powder can be loaded manually or automatically using screw feeders at ground level, thereby keeping powder handling at a minimum. In many cases fluid energy from existing pumps can be used which eliminates the need for additional power. Advantages - Reduced powder handling
- No moving parts
- Complete mixing of powders and liquids
- Materials to suit process
- Low level operation
- Reduced batch times
- No maintenance
- Existing pumps can often be used
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| Portable Liquid Jet Solids Pump for hydraulically transporting sand / filter media |
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| | Transvac Tank Jet Mixers are a mass momentum exchange device which uses the energy of pressurised liquid to entrain, mix and pump a secondary liquid. The principle is used for many process applications including blending, solids suspension, dilution and heat distribution. | Stainless steel Tank Jet Mixing System for blending
in a pharmaceutical plant effluent balance tank |
In operation, pressurised motive liquid is discharged through the jet nozzle into the suction chamber. The change from pressure energy to kinetic energy (velocity) creates a region of low pressure that entrains liquid from within the process vessel via the open suction ports. The motive and suction liquid streams combine and mix under high shear conditions in the venturi diffuser. The resulting mixture is then discharged into the bulk of the process liquor as a high velocity turbulent jet. Standard Transvac Tank Jet Mixers entrain 3 parts suction liquid for every 1 part motive liquid with the discharge jet of 4 parts inducing further secondary mixing. | Polypropylene Tank Jet Mixer for
blending corrosive chemicals |
| | Rubber covered Tank Jet Mixer for suspending
abrasive solids on a chemical works |
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Advantages of Jet Mixers - No moving parts
- No splashing or aerosol created
- Operates at variable depths
- No bridges or bearings used
- No in-tank maintenance needed
- Evenly distributes mixing
- Controllable mixing
- Simple, reliable and robust
Each Tank Jet Mixer is designed to suit the process mixing requirement and single Mixers or a number of mixers mounted on an intank manifold are available. Transvac can offer the basic mixers or a complete system including pipework, pumps and valves. Materials of construction are chosen to suit the process conditions, common materials include stainless steel, carbon steel, Polypropylene, PVCu, PTFE, and GRP. Download our Tank Jet Mixers brochure
See also Tank Jet Mixers in Fluid and Solids Handling
See Application Sheet TJM010
See Application Sheet TVA011
Send us your requirements using our Tank Jet Mixer Enquiry Form. |
| | Transvac Liquid Jet Compressors have been extensively used for entraining ozone and atmospheric air in water treatment applications. Using liquid as the motive force Transvac Jet Compressors can accurately entrain and mix air or gas in-line and discharge against a back pressure. | Liquid Jet Compressor in PVCu with galvanised
mild steel flange connections |
| | Liquid Jet Compressor in PVCu with
screwed union connections |
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Principle of operation In operation a high velocity jet of pressurised liquid discharged from the motive nozzle produces a region of low pressure in the suction chamber that entrains the secondary gas. The two streams then thoroughly mix in the throat before the resulting mixture flows through the diverging cone to regain some pressure in order to overcome system discharge heads. | Advantages - Simple and reliable
- No moving parts
- In-line mixing
- Custom designed
- Materials to suit process
- No maintenance
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Standard materials of construction include rubber-lined, PVCu, PP, PTFE, PVDF, hastelloy, titanium, stainless steel and carbon steel. Connections included flanged, screwed, plain, hosetail and bauer. Download our Liquid Jet Compresors brochure
See Application Sheet LJC010
Send us your requirements using our Liquid Jet Compressor Enquiry Form. |
| | Transvac Venturi Aerators are a mass momentum exchange device which uses the energy of pressurised liquid to entrain, mix and pump air into a secondary liquid.  | | | | Twin barreled, self aspirating, through-wall mounted Venturi Aerator installed in an activated sludge plant. |
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Standard self aspirating units can operate at tank depths of up to 7 metres and offer typical efficiencies between 1.2 and 1.8 kg02/kWh at standard conditions. High alpha factors, simplicity, reliability and low cost make the Transvac Venturi Aerator a competitive with other forms of aeration equipment available on the market. The action of the Venturi Aerator makes it particularly suited to processes that require directional mixing, such as in ‘race-track’ type oxidation ditches or in-line aeration packaged sewage treatment plants. For tanks deeper than 7 metres Blower assisted or high pressure aerator models are available. Advantages - No moving aerator parts
- High oxygen transfer
- High alpha factors
- Minimal maintenance
- Virtually silent operation
- No aerosol spray
- Simple to install and retrofit
- Materials to suit the process
| | Free standing self aspirating Venturi Aerator
installed in an oxidation ditch |
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There are four standard configurations of Transvac self aspirating units : - Free standing
- Floating
- Through-wall
- Guide rail mounted
Principle of operation In operation, recirculated liquid is pumped from the process tank and into the aerator where it is accelerated through the patented vortexing nozzle. This results in an area of low pressure and high velocity into which air is drawn. The two streams intimately mix before discharging as a turbulent plume creating horizontal and vertical mixing patterns across the process tank. | Floating, self aspirating Venturi Aerator
for aerating a large lagoon |
Materials of construction Standard Venturi Aerator materials include stainless steel, carbon steel, PVCu and Polypropylene. Pumps and ancillary equipment materials are selected to suit the process conditions. See Application Sheet TVA010
See Application Sheet TVA012
Send us your requirements using our Venturi Aerator Enquiry Form. |
| | Transvac Mixer / Aerators are a mass momentum exchange device which uses the energy of pressurised liquid to entrain, mix and pump air into a secondary liquid. | Free standing, self aspirating, Venturi Mixer / Aerator
installed to mix and aerate industrial effluent |
The action of the Venturi Mixer / Aerator is ideal for mixing balance tank effluent on industrial plants. The unit not only provides effective liquid / liquid mixing, but it also entrain atmospheric air to further enhance mixing and transfer oxygen into effluent. The system works successfully with varying liquor depths and for keeping solids in suspension. A connection into the tank from the air stack also enables the unit to operate as a liquid / liquid mixer with no air entrainment. With no parts within the tank requiring maintenance and with corrosion resistant materials of construction available the Transvac Mixer / Aerator is an ideal mixing device for plants handling aggressive hazardous effluent. The oxygen transfer feature of the Transvac Mixer / Aerator is used to it’s full on food waste balance tank mixing because it can keep the effluent ’fresh’, avoiding unpleasant odours. Advantages - No moving parts
- No splashing or aerosol created
- Operates at variable depths
- No bridges or bearings used
- No in-tank maintenance needed
- Controllable mixing
- Simple, reliable and robust
- Virtually silent operation
- No aerosol spray
- Materials to suit the process
- Principle of operation
| | Mixer / Aerator installed at a food plant
for mixing and aerating effluent in a balance tank |
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In operation, recirculated liquid is pumped from the process tank into the aerator where it is accelerated through the patented vortexing nozzle. This results in an area of low pressure and high velocity into which air is drawn. The two streams intimately mix before discharging as a turbulent plume creating horizontal and vertical mixing patterns across the process tank. Materials of construction Standard Venturi Aerator materials include stainless steel, carbon steel, PVCu and polypropylene. Pumps and ancillary equipment materials are selected to suit the process conditions. See Application Sheet TVA011
Send us your requirements using our Venturi Aerator Enquiry Form. |
| | Transvac manufacture a complete range of Jet Syphons which use steam as he motive force to pump liquids. These units are ideal for pumping waste liquors in-line and from sump or bunded areas. Extensively used for high integrity nuclear waste pumping and for aggressive effluents on petrochemical and general process applications. Special designs and materials of construction are available. | Mixer / Aerator installed at a food plant
for mixing and aerating effluent in a balance tank |
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