304 Stainless Steel High-Pressure Metering Stop Valve with Internal Thread & Ferrule Connection (Straight Through Type for Vacuum Applications)

Product Overview

This 304 stainless steel high-pressure fine-adjustment globe valve (internal thread, ferrule type) is a specialized valve designed for precise control of small flow rates in high-pressure pipelines. Different from ordinary on-off valves, its core advantage lies in achieving fine adjustment of medium flow through the design of a sophisticated handwheel and valve stem. The combination of internal threaded inlet and ferrule-type outlet allows it to be perfectly connected between high-pressure main pipelines and instruments, sampling points, or experimental equipment. It is widely used in petroleum, chemical, laboratory, vacuum systems, and other occasions that require high-pressure shut-off and fine adjustment.

Detailed Product Features & Advantages

1. Precise Fine-Adjustment Mechanism

• Fine-Thread Transmission: The valve stem only produces small displacement after multiple rotations of the handwheel, realizing precise control of the opening degree with excellent adjustment linearity.
• Stable Opening & Closing: The slow opening and closing speed can effectively prevent system water hammer (pressure impact) and protect downstream precision instruments (such as pressure gauges and sensors).
• Flow Control: It can accurately control small flow rates to meet the process requirements of sampling, filling, and experiments.

2. High-Pressure Sealing & Shut-Off

• Tight Sealing: The valve disc and valve seat are precision ground with hard alloy or body material, ensuring bidirectional sealing, and the internal leakage is almost zero in the shut-off state.
• High-Pressure Design: Thickened valve body and reinforced structure ensure stable operation of the valve under high pressure without deformation or leakage risk.

3. Flexible Connection Combination

• Internal Thread Inlet: Convenient for direct screwing into the threaded interface of equipment or main pipelines, with a compact structure.
• Ferrule-Type Outlet: Easy to connect with instrument tubes such as copper tubes and stainless steel tubes. The ferrule clamps the pipeline to form a firm sealed connection with excellent anti-vibration performance.

4. Wide Applicability

• Vacuum Working Conditions: The excellent valve stem sealing design makes it suitable for vacuum systems as a vacuum fine-adjustment valve or isolation valve.
• Clean Media: Stainless steel material and smooth flow channel meet the requirements of high-purity media transportation.
• Corrosion Resistance: 304 stainless steel material provides good corrosion resistance, extending the service life of the valve.

Detailed Technical Parameters

Selection Guide

When selecting this valve, please confirm the following parameters:

1. Working Pressure

Determine the required nominal pressure level.

2. Medium Type

Confirm the corrosion and purity requirements of the medium to select the material of the valve internal parts.

3. Interface Size

• Specification of the inlet internal thread (e.g., G1/4", NPT1/4").
• Outer diameter of the pipeline adapted to the outlet ferrule (e.g., φ6mm).

4. Operating Environment

Check if there are special requirements such as high temperature and vacuum.

Main Application Fields

• Instrument Measurement Systems: Used as a primary valve (root valve) for instruments such as pressure gauges, pressure transmitters, and flowmeters to realize isolation and fine adjustment.
• Laboratory Equipment: Fine addition and flow control of reaction materials in experimental devices and test benches.
• Vacuum Systems: Fine-adjustment of air intake and precise pressure control in vacuum pipelines.
• Sampling Systems: Provide accurate sample flow for online analyzers or laboratory sampling points.
• Equipment Supporting: Supporting equipment for chromatographs, scientific instruments, hydraulic control systems, etc.

Our Advantages

• Strict Quality Control: Full-process quality inspection from raw materials to finished products.
• Complete Specifications: Provide a variety of specifications and sizes to meet different needs.
• Technical Support: Provide professional technical selection support.
• Reliable Quality: The product is durable, safe and reliable.