GASLAB designs and supplies complete hydrogen gas plants with cylinder filling facility.
On small scale Hydrogen is produced from electrolysis of water in either Knowel̢۪s type Mono Polar Cells or Filter press type Bi-polar cells known as electrolysers.
Knowel's Type Electrolytic Cells
1. Tanks and bells are welded by special quality electrodes to avoid Hydrogen and Caustic soda embrittlement.
2. Bells are manufactured out off C.R.C. Sheets which are specially recommended for Caustic soda handling.
3. The Asbestos diaphragm cloth is manufactured from 100% pure long fiber asbestos without cellulose core and closely woven to avoid pin holes.
4. Extra length of cloth is provided at the bottom to guard against bye-pass of gases.
5. Ebonite Insulators are tested against warping under high temperature and they are checked by Meger for infinity resistance.
6. Nickelling of Anodes is done under strict supervision for a minimum of .002 thick coarse deposit and each plate is tested chemically for pores.
7. The bells are fabricated by special fixtures and pneumatically tested to avoid leakage.
8. Side plates of bells are welded to avoid leakage.
9. Each Electrode plate is made straight by special Jigg and all the plates are perfectly parallel when assembled.
10. The 1" pipes are fixed on the bells with the help of a special Jigg to enable all the tubes to be equidistant and parallel for quick and easy fitting of the Electrode plate.
11. Each Electrode plate has two FULL-LENGTH copper rods.
Feed of water
The performance and long life electrolyser depends on the quality of feed water. As only Hydrogen and Oxygen together with some water vapour escape from the electrolyser. Each impurity introduced with the feed water will accumulate in electrolyte, i.e. Chloride, Sulphate and iron. The former two will have harmful effect on Nickel metal which leads to heavy corrosion and the later will cause impure Oxygen gas, The most suitable and economical method for production of pure feed water is by Ion Exchanger (DM water). The immediate detection of impurities in the feed water is its specific conductivity which should not exceed 2 x 10 ohm/CM Every cubic meter of Hydrogen produced, requirement 1 lt., of feed water, which is measured by rotameter provided with each plant.
Purity of Gases:
Hydrogen=99.8+ 2 by Vol.
Oxygen =99.5+ 0.5 by Vol.
Gas Pressure:
Max. 250 mm of water Column which is sufficient for stroage in low pressure Gas Holders. When oxygen is not required to store in Gas holder it is vented through pressure balancing tank to atomsphere.
Air Pollution:
(in filter press type) : NIL
(in Knowel type) :
Minor leakage of gases connot be detected, which cause caustic atomsphere in the cell room.
Fire Hazards:
(in filter press type) : NIL
(in Knowel type) :
1. In case of loose electrical connection.
2. In case of Blocking of the cells from bottom by desposition of soild Caustic and Carbonate
3. Short circuit due to leakage of electrolytes.
Design of Electrolyser
1. The cell is in circular shape for uniform distance between Anode and Cathode.
2. The asbestos diaphragm is fixed on solid frames with bolting, which keeps the generated gases separate and maintain uniform purity.
3. The frames, center electrodes, end electrodes, end frames are fully machined from selected steel and Nickel-plated to have uniform pressure on each frames and gasket. Thus the iron in electrolyte and leakage is fully controlled.
4. The installation of Electrolyte separation tanks, Gas coolers and Gas washing tanks are arranged in such a manner that the cell can be attended without dismantling the complete plant. The cell can be easily installed in a room of 15 feet height.
5. The +Ve(Anode) -Ve(Cathode) connection are provided on top of cell to have minimum length of Bus Bars and maximum safety.
6. The filter provided will remove any fine fibers of Asbestos, dust, rust and carbonate which causes resistance to electricity and reduce efficiency.
7. The Anode and Cathode electrodes are designed and fabricated from 1.6 mm thick CRCA steel to have minimum over voltage of gases and uniform distribution of electrolyte and electricity.
8. The plants are supplied with base frame and insulators ready to install without foundation.
9. The VE: 1000 and 2000 filter press type can be easily installed in parallel and series with 2000 Amps. Knowel's cells. The combination will produced more gas using the rectifier already in use.
The disconnected Knowel's cells can be kept as spare for replacement of damaged Knowel's cells. Thus cells can be replaced most economically.

GASLAB designs and supplies complete hydrogen gas plants with cylinder filling facility.
On small scale Hydrogen is produced from electrolysis of water in either Knowel̢۪s type Mono Polar Cells or Filter press type Bi-polar cells known as electrolysers.
Knowel's Type Electrolytic Cells
1. Tanks and bells are welded by special quality electrodes to avoid Hydrogen and Caustic soda embrittlement.
2. Bells are manufactured out off C.R.C. Sheets which are specially recommended for Caustic soda handling.
3. The Asbestos diaphragm cloth is manufactured from 100% pure long fiber asbestos without cellulose core and closely woven to avoid pin holes.
4. Extra length of cloth is provided at the bottom to guard against bye-pass of gases.
5. Ebonite Insulators are tested against warping under high temperature and they are checked by Meger for infinity resistance.
6. Nickelling of Anodes is done under strict supervision for a minimum of .002 thick coarse deposit and each plate is tested chemically for pores.
7. The bells are fabricated by special fixtures and pneumatically tested to avoid leakage.
8. Side plates of bells are welded to avoid leakage.
9. Each Electrode plate is made straight by special Jigg and all the plates are perfectly parallel when assembled.
10. The 1" pipes are fixed on the bells with the help of a special Jigg to enable all the tubes to be equidistant and parallel for quick and easy fitting of the Electrode plate.
11. Each Electrode plate has two FULL-LENGTH copper rods.
Feed of water
The performance and long life electrolyser depends on the quality of feed water. As only Hydrogen and Oxygen together with some water vapour escape from the electrolyser. Each impurity introduced with the feed water will accumulate in electrolyte, i.e. Chloride, Sulphate and iron. The former two will have harmful effect on Nickel metal which leads to heavy corrosion and the later will cause impure Oxygen gas, The most suitable and economical method for production of pure feed water is by Ion Exchanger (DM water). The immediate detection of impurities in the feed water is its specific conductivity which should not exceed 2 x 10 ohm/CM Every cubic meter of Hydrogen produced, requirement 1 lt., of feed water, which is measured by rotameter provided with each plant.
Purity of Gases:
Hydrogen=99.8+ 2 by Vol.
Oxygen =99.5+ 0.5 by Vol.
Gas Pressure:
Max. 250 mm of water Column which is sufficient for stroage in low pressure Gas Holders. When oxygen is not required to store in Gas holder it is vented through pressure balancing tank to atomsphere.
Air Pollution:
(in filter press type) : NIL
(in Knowel type) :
Minor leakage of gases connot be detected, which cause caustic atomsphere in the cell room.
Fire Hazards:
(in filter press type) : NIL
(in Knowel type) :
1. In case of loose electrical connection.
2. In case of Blocking of the cells from bottom by desposition of soild Caustic and Carbonate
3. Short circuit due to leakage of electrolytes.
Design of Electrolyser
1. The cell is in circular shape for uniform distance between Anode and Cathode.
2. The asbestos diaphragm is fixed on solid frames with bolting, which keeps the generated gases separate and maintain uniform purity.
3. The frames, center electrodes, end electrodes, end frames are fully machined from selected steel and Nickel-plated to have uniform pressure on each frames and gasket. Thus the iron in electrolyte and leakage is fully controlled.
4. The installation of Electrolyte separation tanks, Gas coolers and Gas washing tanks are arranged in such a manner that the cell can be attended without dismantling the complete plant. The cell can be easily installed in a room of 15 feet height.
5. The +Ve(Anode) -Ve(Cathode) connection are provided on top of cell to have minimum length of Bus Bars and maximum safety.
6. The filter provided will remove any fine fibers of Asbestos, dust, rust and carbonate which causes resistance to electricity and reduce efficiency.
7. The Anode and Cathode electrodes are designed and fabricated from 1.6 mm thick CRCA steel to have minimum over voltage of gases and uniform distribution of electrolyte and electricity.
8. The plants are supplied with base frame and insulators ready to install without foundation.
9. The VE: 1000 and 2000 filter press type can be easily installed in parallel and series with 2000 Amps. Knowel's cells. The combination will produced more gas using the rectifier already in use.
The disconnected Knowel's cells can be kept as spare for replacement of damaged Knowel's cells. Thus cells can be replaced most economically.