A manual slide gate valve is an industrial valve for controlling dry bulk solids, powders, granules, and slurries. It is installed in pneumatic conveying systems, silos, hoppers, and bins. A flat gate plate slides vertically or horizontally to open or close the flow passage. Manual operation via a hand wheel or lever provides simple, safe, and economical control. It is widely used in industries handling bulk materials.

The working principle is simple. Rotating a hand wheel drives a threaded spindle, moving the gate plate forward or backward. In the open position, the gate retracts fully for unobstructed flow. In the closed position, it extends across the bore and seals tightly. This motion gives quick operation and low pressure drop. The design prevents cross contamination and material leakage.

The valve consists of a valve body, a gate plate, a spindle, a hand wheel, and a mounting base. The body is made of cast iron, cast steel, or stainless steel. The gate plate is precision machined for smooth movement and tight fit. Sealing options include packing seals, O-rings, or PTFE gaskets, depending on media and application.

Materials are critical for performance and durability. Carbon steel offers high strength and low cost for general applications. Stainless steel 304 and 316 provide corrosion resistance and hygiene for food, pharmaceutical, and chemical industries. For abrasive materials, hardened steel or ceramic-lined gates are recommended. Surface finish can be customized to meet sanitary standards.

Key features are compact structure, lightweight, easy disassembly, and low maintenance. The full bore opening prevents material buildup and ensures smooth flow. Optimized thread ratio reduces operating effort. Valves comply with ANSI, DIN, JIS, and GB flange standards for pipeline compatibility.

Typical sizes range from DN50 to DN600, with custom sizes available on request. Working pressure is up to 10 bar, and temperature ranges from -20°C to 400°C depending on materials and seals. Connection types include wafer, lug, and flanged designs.

Manual slide gate valves serve many industries, including cement, power, steel, mining, chemical, food processing, and wastewater treatment. They handle powdery, granular, and fibrous materials. Common applications are silo discharge, hopper outlet control, dust collector isolation, and feeding systems. They are also used in plastic and rubber industries.

Our valves are manufactured under the ISO9001 quality management system. Each unit undergoes rigorous pressure testing and leak testing before delivery. We can provide material certificates and dimensional inspection reports. Tight quality control ensures reliable performance and long service life.

Correct installation ensures long service life. Inspect the valve and clean the pipeline before installation. Align the pipeline and install gaskets and bolts properly. Periodically check gate movement and lubricate the spindle and hand wheel. Replace worn seals or gate plates promptly.

Selection considerations include media type, temperature, pressure, valve size, orientation, and operating frequency. For abrasive or sticky media, a metal-to-metal seal or scraper design is preferred. For corrosive environments, use stainless steel with suitable elastomers. Manual operation is ideal for remote or power-limited sites. Consult our engineers for the best solution.

As a professional manufacturer, we supply high-quality manual slide gate valves at competitive prices. We support customization of size, material, connection, and sealing. Our factory uses CNC machinery and strict quality control. Send us your specifications for a quote; we respond within one working day. We offer competitive prices for bulk orders.

Valves are packed in wooden cases or pallets to avoid damage during transport. We offer worldwide shipping by sea, air, or land. Delivery time is normally 15 to 30 days after order confirmation. Please contact us for detailed packing and shipping instructions. Customer satisfaction is our priority.