MFZ type rising stem cast iron copper-inlaid square gate

• Product Overview

The Open-rod Cast Iron Copper-Enamel Square Gate is a hydraulic control device engineered by our company for regulating water flow and maintaining water levels in rectangular channels or canals. Featuring an integral cast iron structure with copper alloy inserts at critical sealing points, this gate incorporates an open-rod transmission mechanism to deliver a reliable flow control solution for water supply/drainage systems, hydraulic engineering projects, and wastewater treatment facilities. It is particularly suitable for fluid control applications at rectangular cross-sections such as pumping stations, reservoirs, and culverts.

• Structure and Working Principle

1. Core structural composition

This gate is a complete set of equipment, mainly composed of the following parts:

• Frame and gate: Constructed as a monolithic unit from premium gray cast iron (HT200/250) or ductile iron (QT450), this robust structure provides the essential load-bearing capacity for hydraulic pressure.
• Guideway and wedge assembly: The symmetrical left-right guide rails ensure linear motion of the gate. The innovative adjustable wedge clamping mechanism compensates for long-term operational wear, maintaining consistent tight contact between sealing surfaces.
• Copper alloy sealing surface: High-grade copper alloy strips (e.g., ZCuSn5Pb5Zn5) are precision-molded and machined at the sealing contact interface between the gate plate and door frame. This is the core component for achieving superior sealing and corrosion resistance performance.
• The open-close screw (operating screw) is manufactured from high-quality carbon steel with anti-corrosion surface treatment. It connects the hoist at the top and the gate at the bottom, serving as the core component for power transmission.

2. Working Principle

The gate operates in coordination with its auxiliary hoist (manual, electric, or dual-purpose). When the hoist is activated, its output shaft drives the open lever to rotate. Through the screw-nut transmission mechanism, this rotational motion is converted into vertical movement of the gate panel along the door frame guide rails. This precise control enables full opening/closing of the orifice or fine-tuning to any intermediate position, thereby regulating flow through the opening.

• Core Technical Features

1. Sealing method: Metal-to-metal seal with embedded copper alloy, suitable for clear water and general water quality.
2. Visibility and operability: The design of the visible stem makes the gate open and closed state visually apparent, facilitating on-site judgment and control by operators.
3. Structural strength: The square door body and door frame cast in cast iron have good pressure bearing and structural stability.
4. Maintenance convenience: The main transmission and load-bearing components are located on the water surface, facilitating routine inspection, lubrication, and maintenance operations.

• Main Technical Parameters

• Typical application scenarios

This device may be considered for use in scenarios requiring reliable flow cutoff or flow control in rectangular channels:

• Municipal water supply and drainage system: control of sewage treatment plant, intake channel of pumping station and overflow channel.
• Water Conservancy and Farmland Irrigation: Canal Control Gate and Water Dividing Gate.
• Industrial water treatment: control of opening and closing of circulating water channels and drainage open channels.
• Other works: landscape water level control, floodgate, etc.