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Capital Controls developed the all-vacuum gas feeders which has become the worldwide standard. Series 200 gas feeders are designed for manual or semi-automatic gas regulation. Automatic is a simple addition.
Easy to install, for indoor or outdoor installation, each 200 Series feeder is factory tested and needs no field adjustment prior to start-up. Ten different flowmeter capacities provide versatility in meeting gas flow requirements. Feeders mount directly on the gas valve of a cylinder, ton container or mainfold utilizing a lead gasketed positive yoke clamp. Diaphragm ejectors are standard with a choice of diffuser outlets. As an option, a variety of different ejectors are available to meet your application needs.
A 200 Series gas feeder consists of a vacuum regulator, ejector or chemical induction unit and vacuum and vent tubing to make a complete system. If multiple feed points are required, remote meter panels are required, remote meter panels and additional ejectors are provide. A switchover module is offered to provide for uninterrupted service.
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- Safe and reliable all-vacuum operation
- Lifetime warranty on diphragm and springs
- Worldwide standard for gas feeder technology
- Superior materials of construction for wet or dry gas service.
- 3-year warranty
- Safe integral venting system
- Capacities up to 500 PPD (10kg/h)
- Solid silver rate and inlet valves
- Accurate gas metering of :
Chlorine
Sulphur Dioxide
Ammonia
Carbon Dioxide
- Versatile mountings : direct cylinder, manifold or ton container
- Switchover capabnility with automatic reset for uninterrupted service.
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Design Feature
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Sonic Flow: Gas flows at sonic velocity maintaining constant gas flow; additional pressure regulation is not required.
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Automatic Switchover: A separate, independent device that does not require manual reset. Flow indication is available at both vacuum regulators. Each vacuum regulator has a separate independent vent and an integral pressure relief device.
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Versatility: Cylinder, manifold or ton container mounting. Unit can be modified for semi-automatic or automatic control. Variety of ejectors available for all applications.
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Reliable: Over 35 years of experience with all vacuum operation, loss of chlorine supply indicator, integral venting system, double - thickness main regulating diaphragm, lifetime warranty on diaphragm and spring, integral gas flow indicator.
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Ease of maintenance: Simplicity of design and modularized components; such as the replaceable inlet capsule for minimized maintenance.
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Superior materials of construction: Solid silver rate valve, monel drip leg for ton mounting, corrosion resistant yoke assembly, tantalum springs.
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Water flowing through the ejector venturi, creates a vacuum which opens the check valve in the ejector. The vacuum is carried through the vacuum line to the vacuum regulator where the differential pressure causes the inlet valve at the vacuum regulator to open, initiating gas flow. A spring opposed diaphragm in the vacuum regulator, regulates the vacuum. The gas passes under vacuum through the flowmeter, the rate control valve, the vacuum line and to the ejector. Here the gas is thoroughly mixed with water and applied as a solution.
The system is completely under vacuum from each ejector to the vacuum regulator inlet safety valve. If the water supply to any ejector stops or vacuum is lost for any other reason, the spring loaded inlet valve immediately closes and isolates the gas supply. If the gas source depletes the unit seals to prevent moisture from being drawn back into the gas source. When more than one feed point is desired multiple flowmeter and ejectors can be supplied.
For uninterrupted gas feeding on a round-the-clock basis, an automatic switchover system is required. Each system consists of two vacuum regulators, one vacuum type automatic switchover module, one ejector and one remote meter panel. An automatic switchover module allows gas to flow under vacuum from the regulator in service through the switchover module to the remote meter panel and the ejector, until that source is depleted. The vacuum sealing valve on the regulator then closes and the vacuum level in the system increases, initiating the spring-loaded toggle assembly in the switchover module. The open valve on thedepleted sourcee closes while the valve on the standby source opens to permit gas flow. When a fresh gas supply replaces the depleted source it will automatically be placed in standby. The fresh supply will not be accessed until the supply in servaice is exhausted.
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Chemical Industion Units
Capital Controls CHLOR-A-VAC TM Series 1420 chemical induction units offer improved chlorination and dechlorination through the high-effeciency mixing of gaseous chemical with process water. This translates into operating and chemical cost savings.
CHLOR-A-VAC units produce a vacuum when process water passes through water inlet ports and through a ventrui. The high vacuum and recessed impeller create great turbulence and complete chemical mixing.
A chemical induction unit in lieu of an ejector should be considered for the following applications: contact basins, headwater, return sludge processes, clarifier inlets, collection basins, equalization tanks and clear wells.
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Technical Data
Capacities: Standard dual-rate indicating flowmeters are available with the following capacities: 0.6, 1.5, 4, 10,25, 50, 100, 200, 250, 1, 2, 4, 5, 10 kg/h) of chlorine gas. To determine feed rates for other gases, multiply each chloring value by:
0.95 for sulphur dioxide
0.50 for ammonia
0.78 for carbon dioxide
Flowmeter: The minimum feed capacity for every gas flowmeter is 1/20th of the maximum capacity. Accuracy is within 4% of maximum flowmeter capacity.
Electrical Requirements: On ton mounted units the drip leg is provided with a 120/240 Vac, 50/60 Hz, single phase heater. Explosion-proof heaters are available upon request.
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