OSY Gate Valve

The opening and closing parts of the OSY Gate Valve are the gate plate, which moves perpendicularly to the fluid direction, and the gate valve can only be fully open or fully closed, not used for regulating water flow. Due to its exposed stem design, the exposed stem structure allows maintenance personnel to visually see the valve's open state and can be paired with a monitoring switch for use in an automatic alarm system. It can be divided into two types according to the connection method: flanged gate valve and groove gate valve.

Parameters

Application field:

In fire sprinkler systems, ductile iron osy gate valves are usually installed before the alarm valve group or on the main water supply pipeline of the floor, used to control the flow of water into the sprinkler system. It is usually connected to the monitoring switch. When the valve is closed or opened, the fire control center will display an alarm or status signal. It is also commonly used in municipal, industrial and infrastructure main water supply pipelines, as they are made of ductile iron and stainless steel, with high strength, good durability and strong corrosion resistance, ensuring the normal transportation of water, oil and other media.

Note: During use, regular maintenance and inspection must be carried out to ensure its proper operation. This is because any malfunction or failure of the valve may cause serious damage to the fire fighting system and endanger property and personal safety.

FAQ

Q1: Which pipeline systems are flanged osy gate valve suitable for?

A: OSY (Outside Screw and Yoke) gate valves are widely applied in fire protection systems, water supply and drainage, oil and gas pipelines, industrial process systems, and municipal engineering. They are ideal for scenarios requiring full-flow, tight shut-off and visual on-off status, especially fire water mains, sprinkler system risers, industrial medium pipelines, and high-pressure fluid control systems.

Q2: What types of media are being processed?

A: They are suitable for clean media such as water, oil, gas, and steam, as well as mild to moderate corrosive liquids. Carbon steel Rising stem gate valves are used for general media, while stainless steel models are suitable for corrosive media (e.g., chemical liquids). They are not recommended for media with large solid particles or high viscosity, which may cause valve jamming.

Q3: Where do the core features of the design mainly lie?

A: The core advantage is the outside screw design—valve stem and yoke are outside the valve body, avoiding contact with media and reducing corrosion. The visual on-off indicator (rising/falling stem) allows quick confirmation of valve status, preventing misoperation. They have full-bore design with low flow resistance, tight shut-off performance, and high pressure-bearing capacity, suitable for long-term stable operation.

Q4:Which specifications and models are available for selection? 

 ZSZF8-Q-50-16

 ZSZF8-Q-65-16

 ZSZF8-Q-80-16

 ZSZF8-Q-100-16

 ZSZF8-Q-200-16 (Main Model)

Q5:Are resilient seat gate valves certified as fire protection products?

A：Compliant with the requirements of the CCCF-CПRZ-20:2019 Fire Protection Product Certification Implementation Rules, they have passed the national fire protection product certification, which is achieved through type tests, initial factory inspections, and post-certification supervision manufacturing.