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Product Name	Bottom-Fill High-Flow Trough Valve
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Product Overview	The Bottom-Fill High-Flow Trough Valve is an underwater-mounted automatic float valve designed for rapid replenishment of livestock drinking troughs and agricultural water tanks. Its pilot-operated diaphragm structure provides high water delivery capacity while keeping the valve assembly compact and protected below the operating water level. The remote float is connected to the valve by a durable cord and controls a small pilot mechanism. This arrangement allows the main valve to deliver high flow without requiring a large conventional float arm. The compact, non-corrosive construction is particularly useful in commercial livestock facilities where rapid trough recovery, durability and efficient use of installation space are important.
Key Features	High-flow design with reference capacity up to approximately 600 L/min. Designed specifically for underwater mounting in livestock troughs and tanks. Bottom-entry or suitable side-entry installation for concealed and protected water delivery. Pilot-operated diaphragm mechanism provides efficient high-volume water control. Compact construction minimizes obstruction inside livestock drinking troughs. Corrosion-resistant polymer materials are suitable for wet agricultural environments. Slow-closing action helps reduce pressure shock and water hammer. Float position can be adjusted without special tools. Horizontal or vertical valve orientation supports different trough and pipe layouts. Manual lock-off switch allows the valve to be held in the closed position for servicing. Valve body can be separated from the inlet tail for convenient access to seals. Mechanical and hydraulic operation requires no electricity or electronic controller.
Structural Components	Main Valve Body: Glass-fiber-reinforced nylon construction provides strength and corrosion resistance. Pilot Valve Mechanism: Uses float movement to control pressure within the main diaphragm chamber. Diaphragm: EPDM component controls the main water passage according to pilot-valve pressure changes. Remote Float: HDPE float monitors the trough water level. Float Cord: Transfers float movement to the pilot operating mechanism while allowing flexible positioning. Internal Components: Acetal and other engineering polymers are used in key water-control components. External Arm Assembly: Durable polymer construction supports the operating mechanism. Filter: Polymer filter components help protect the pilot system from larger contaminants. Seals and O-Rings: TPU and nitrile components provide sealing within the valve assembly. Fasteners: 304 stainless steel springs, bolts, nuts, pin and screws provide corrosion-resistant mechanical connections.
Working Principle	The valve is installed below the normal water level. A remote float connected by a nylon cord rises and falls with the water surface. When livestock consumption causes the water level to drop, the float moves downward and opens the pilot valve. This changes the hydraulic pressure across the main diaphragm, causing the main valve to open and allowing a high volume of water to enter the trough. As the trough refills, the float rises. The pilot valve closes, pressure is restored across the diaphragm and the main valve closes progressively. The controlled closing action helps minimize sudden hydraulic shock in the farm water-supply line.
Technical Specifications	Product Type Underwater high-flow automatic float valve Control Principle Float-operated pilot diaphragm valve Reference Maximum Flow Up to approximately 600 L/min, depending on inlet pressure and piping conditions Operating Pressure 0.3-7 bar / 5-100 psi Maximum Operating Temperature 60°C / 140°F Available Inlet Sizes 32 mm / 1-1/4", 40 mm / 1-1/2", 50 mm / 2" Thread Options BSP or NPT according to selected configuration Mounting Method Underwater mounting only Installation Orientation Horizontal or vertical Reference Water Level Differential Approximately 20-60 mm, increasing as inlet pressure increases Main Body Material Glass-fiber-reinforced nylon Diaphragm Material EPDM Float Material HDPE Fastener Material 304 stainless steel Valve Reference Dimensions Approximately 108 × 110 mm main valve envelope Power Requirement None Additional Specifications Available upon request / According to project requirements
Applications	Commercial pig farm drinking-water troughs Sow, nursery and finishing pig-house water systems Cattle and dairy drinking troughs Large livestock drinking tanks Sheep and goat watering installations Horse and equine water troughs Agricultural water storage tanks High-demand livestock watering points Livestock equipment renovation projects Complete steel structure farm and agricultural construction projects
Customization Options	32 mm, 40 mm or 50 mm inlet connection according to required flow capacity. BSP or NPT thread standards according to destination market. Bottom-entry or suitable side-entry piping arrangement according to trough construction. Horizontal or vertical valve orientation according to installation space. Compatible pipe adapters and installation accessories available upon request. Water-line sizing and pressure regulation according to project requirements. Packaging and project quantities customizable for distributors, contractors and livestock equipment suppliers. Final configuration designed according to local climate and farm conditions.
Installation & Maintenance	Confirm that underwater float-valve installation is permitted by applicable local plumbing and water-supply regulations. Install the valve below the normal trough water level in the specified bottom-fill or compatible side-entry position. Flush newly installed farm water lines before connecting the valve to reduce contamination by construction debris. Use adequately sized supply pipework to obtain the required high-flow performance. Ensure the remote float and operating cord can move freely without interference from trough walls or livestock equipment. Adjust the float position to achieve the required shut-off water level. Use the built-in lock-off function before servicing the valve. Periodically inspect the filter, diaphragm, seals, float cord and stainless steel fasteners. Clean sediment or mineral deposits where farm water quality requires additional maintenance. The valve assembly can be unscrewed from its inlet tail to simplify seal inspection and servicing. Protect water lines and associated equipment against freezing according to local climate conditions.
Product FAQ	Q: Why is this valve called a bottom-fill valve? A: It is designed to operate below the water surface and allows the supply line to enter through the bottom or a compatible underwater side connection, keeping the main valve assembly submerged. Q: What is the reference maximum flow capacity? A: The valve range is rated for flow up to approximately 600 L/min. Actual flow depends on inlet pressure, pipe diameter, fittings and the selected valve connection size. Q: Can it be installed above the water level? A: No. This configuration is specifically designed for underwater mounting. An above-water float valve should be selected when the installation requires the valve body to remain above the water surface. Q: Is it suitable for commercial pig farms? A: Yes. Its high-flow capacity can support livestock troughs and water tanks with rapid replenishment requirements, provided the farm water supply and trough capacity are correctly designed. Q: Does the valve require electricity? A: No. Float movement, pilot control and diaphragm actuation are entirely mechanical and hydraulic. Q: How does the valve reduce water hammer? A: The main diaphragm closes progressively instead of abruptly stopping the full flow, helping reduce hydraulic shock in a properly designed water system. Q: Which inlet sizes are available? A: Reference options include 1-1/4", 1-1/2" and 2" connections, with BSP and NPT configurations available depending on the selected model. Q: Is the water level adjustable? A: Yes. The float position can be adjusted without special tools to establish the required operating level. Q: Can the valve be serviced without removing the complete pipe connection? A: The valve body is designed to unscrew from the inlet tail, providing convenient access to the valve seal and internal components. Q: Can it be supplied for international livestock projects? A: Yes. Connection size, thread standard, installation accessories and project quantities can be selected according to project requirements.