1. Introduction

A large-to-small ball valve (also called a reducing ball valve) is a specialized flow control valve with a larger inlet port and smaller outlet port, integrating the 90° quick-opening/closing advantage of ball valves with flow reduction functionality. It is designed to connect pipelines of different nominal diameters, realizing precise flow regulation, pressure stabilization, and medium distribution in systems where pipeline size transitions are required.

Features：

• Structure Design: The valve body adopts a reducing structure (e.g., DN200 inlet × DN150 outlet, 8' × 6'), with a spherical core whose through hole matches the outlet diameter; the 90° rotating stem ensures fast on/off operation.

• Dual Functions: Combines 'shutoff' (reliable sealing like standard ball valves) and 'reducing' (eliminating the need for additional reducers), simplifying pipeline layout and reducing leakage points.

• Performance Advantages: Low flow resistance (smoother than separate valve + reducer combinations), tight sealing (metal or soft seats optional), and adaptability to high pressure/temperature (Class 150–2500, -29°C to 538°C based on materials).

2. Application

• Pipeline transitions: Oil/gas transmission lines, municipal water supply networks, and industrial process pipelines (connecting large main pipes to small branch pipes).

• Flow control scenarios: Chemical dosing systems, boiler feedwater pipelines, and HVAC water circulation systems (stabilizing flow/ pressure for downstream small-diameter equipment).

• Harsh media: Corrosive fluids (stainless steel/duplex steel bodies) or viscous media (smooth inner cavity to avoid residue accumulation).

3. Technical data

1. Working mediumm: Water

2.Nominal pressure: 1.6MPa

3.Working Temperature: -20℃

4. Material: Stainless Steel 304

5. Thread: Conforming to the standardofGB/T8464-2003

4.Dimensions