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  • Greenhouse gas emissions from agricultural irrigation in China
    Drip Irrigation Main pipe: 8 m (PVC, DN 110 mm), 11.50 m (PVC, DN 90 mm ), 13.2 m ( PVC , DN 75 mm); Branch main pipe: 17 … … Capillary: 3,379 m (PVC, DN l6mm); ball valve : 12, connector: 528, centrifugal …
  • Behaviour of estrogenic endocrine-disrupting chemicals in permeable carbonate sands
    The primary treated influent was connected to a 240-L PVC barrel with a 15- mm ball float valve to maintain a constant volume. … the barrel via a 12-V submersible pump (Amazon) to a capped 450× 90 mm PVC header …
  • Design of a Poultry Disease Isolation Facility with Programmable Environmental Control
    For water, two 13- mm (0.5-in.) lines are connected to the side of each unit. One of these lines, at a pressure of 620 kPa ( 90 psi), is used to clean the … The high pressure line is controlled outside each isolation unit by a hand ball valve while the low pressure line is controlled outside the unit by a hosecock clamp. All PVC pipe used is schedule 40.
  • Design and Evaluation of a Sequential Biological Treatment System for Dairy Parlor Wastewater in Southeastern Louisiana
    Maximum depth of WLD was controlled by 0.90-m long; 102- mm diameter discharge pipes connected by 90 ° elbows and unglued threaded PVC couplings to regulate height of discharge into the outlet pipe situated at the terminal end of the … Pipes and ball valves (PVC) were placed strategically to control flow between every stage of treatment (anaerobic ⇒ aerobic ⇒ constructed wetlands).
  • An Approach for Simulating Rainfall Above the Tree Canopy at the Hillslope Scale
    … of the Nelson S3000 sprinkler demonstrated the maximum rainfall rate to be 51 mm /h with an … … constant pressure of 103 kPa, and the spray pattern can be adjusted from 90 ° to 360°. The sprinkler manifold was made of polyvinyl chloride ( PVC ) piping, which is lightweight and inexpensive, and included four ball valves .
  • Flow uniformity in a multi-intake pump sump model
    The valve type is ball valve . The final suction pipelines are replaced by flexible composite material vinyl pipes of 150 mm diameter because the original PVC 90 degree elbows causes severe flow resistance owing to their mal-functioned shape.
  • An open‐air system for exposing forest‐canopy branches to ozone pollution
    … Ozone-enriched air was carried in a 3-8 cm outer diameter (OD) PVC pipe manifold routed … The rate of flow of ozone-enriched air was manually adjusted through ball valves on the delivery manifold and an over- flow pipe to prevent over-pressurization of the delivery system. The orifices (ca, 0-5 mm diameter) were spaced at 2-5 cm intervals in groups of three at 0, 90 , 180° (in cross section) and between each group a single orifice was placed at 90°, This perforated length was fastened at …
  • Design and Operation of a Farm Anaerobic Digester for Swine Manure
    These problems have been eliminated by replacing the ball valve with a swine gate check valve. The 76 mm PVC pipe has proven large enough for both the influent and effluent lines. Plugging has oc-curred only at a 90 deg elbow located in the influent line.
  • George Fischer Offers New Type 375 Ball Valve
    Other outstanding features include a safeblock ball seat and blow-out proof stem with double stem seals … The valve handle doubles as a spanner wrench to adjust or remove the adjustable seat carrier, providing … The Type 375 Valve in PVC and CPVC material is available in sizes 3/8" - 6" and comes … In PP-n, the valve is available from 20 mm to 90 mm (metric socket) and ½ to 2" (NPT).
  • Type 375 Ball Valve Offers Sleek Aesthetics In Variety Of Materials And Sizes
    Other outstanding features include a safeblock ball seat and blow-out proof stem with double stem seals … The valve handle doubles as a spanner wrench to adjust or remove the adjustable seat carrier, providing … The Type 375 Valve in PVC and CPVC material is available in sizes 3/8" – 6" and … In PP-n, the valve is available from 20 mm to 90 mm (metric socket) and ½ to 2" (NPT).