Commodity carbon dioxide fertilizers are available in solid, liquid and gaseous forms.
   Solid fertilizer  It can be dry ice or granules, and dry ice becomes CO2 gas at room temperature for crop absorption and utilization. Due to transportation and storage difficulties, the cost is high. When using, people can not directly contact with dry ice to prevent low temperature damage; granules can be directly sprinkled on the ground or buried in the soil, and CO2 gas is produced after water absorption . The dosage of about 40 kg per mu can be continuously released within 40 days.
   Liquid fertilizer  When in use, the cylinder containing CO2 is placed in the protective ground, and the CO2 gas is conveyed by a pressure reducing valve to a portion where the crop can be fully utilized. A hole is made every 3 mm on the hose, and the diameter of the cylinder is gradually increased from near to far, so that carbon dioxide gas can be reflected to the ground through the shed film. When the bottle mouth pressure is 1 to 1.2 kg per square centimeter , it can be released for 6 to 12 minutes per day .
    Gaseous fertilizer (double micro CO2 gas fertilizer)  It is a biological product, which contains a large amount of microorganisms and produces CO2 by fermentation under suitable conditions , and has the characteristics of low cost and practicality. Apply 1 capsule per square meter , the depth is 3 cm, and the application amount per mu is not less than 6.7 kg. The relative humidity of the soil is required to be about 80% , and the soil temperature is above 15 °C . The carbon dioxide can be continuously released for more than 30 days in one use .
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Electric Butterfly Valve is operated by electric actuator, the actuator has open close type and regulating type, power 24VDC, 220VAC. valve have different type and material for optional, wafer type, lug type, flanged type, PVC, CPVC, PVDF, PP, PPH, EPDM, PTFE lined, rubber lined. standard following DIN, ANSI, JIS, pressure rate of PN10, PN16, 150LB, 10K. size from 2" to 40", limited switch, solenoid valve are optional.
Ningbo RMI Plastic Co.,Ltd offer electric Butterfly Valve with specification:
Size:DN50~DN1000 (2 inch ~ 40 inch)
Connection: wafer, lug, flange ANSI CL150, JIS10K, DIN PN10
Material:PVC-U;PVC-C;PVDF;FRPP;PP-H,WCB,CI
Actuator:Electrical
Operating type:Open/Shut, Regulating
Power supply:DC24V;AC220V;AC380V
Electric Butterfly Valve
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Ningbo RMI Plastic Co., Ltd. , http://www.rmiplast.com