Q41F national standard floating soft seal forged steel ball valveProduct Introduction

Q41F national standard floating soft seal forged steel ball valve is a type of cut-off valve with excellent structure and performance. It evolved from a plug valve and achieves rapid opening and closing of the medium by rotating the ball around the valve stem axis by 90 °. This valve is sealed in various pipeline systems and is mainly used to cut off or connect the flow of media, so that the media can be transported to various fixed places according to the predetermined program. With its excellent characteristics, it has been widely used in multiple fields.

Q41F national standard floating soft seal forged steel ball valve core advantages

Extremely low fluid resistanceThe resistance coefficient is equal to that of a pipe section of the same length, which can effectively reduce energy loss during the medium transportation process.

Compact and lightweight structureThe overall structure is simple, with the characteristics of small volume and light weight, making it easy to install and maintain.

sealThe sealing surface material mainly uses plastic, which has good sealing performance and has been widely used in vacuum systems.

Convenient and efficient operationQuick opening and closing, only need to rotate 90 ° from fully open to fully closed, making it easy to achieve remote control.

Simple and easy to maintainThe structure is simple, and the sealing ring is generally designed to be movable, making it easy to disassemble and replace.

Strong erosion resistanceWhen fully open or fully closed, the sealing surfaces of the sphere and valve seat are separated from the medium, and the passage of the medium will not cause erosion of the sealing surfaces.

Widely applicableThe diameter can range from a few millimeters to several meters, and can be applied in environments ranging from high vacuum to high pressure.

Application fields of Q41F national standard floating soft seal forged steel ball valve

This ball valve is suitable for general industrial use, especially for industries such as chemical, petroleum, natural gas, metallurgy, etc. It can also cope with complex working conditions such as hydrogen sulfide containing media, high impurities, and severely corroded natural gas long-distance pipelines. When selecting different materials, they can be applied to various media such as water, steam, oil products, liquefied gas, natural gas, coal gas, nitric acid, acetic acid, oxidizing media, urea, etc.

Q41F National Standard Floating Soft Seal Ball Valve Installation and Maintenance Guide

Pre-installation preparation

Check the valve statusConfirm that the sphere is in the fully closed position (with the handle perpendicular to the pipeline) to prevent impurities from entering the sealing surface during installation.

Clean the pipelineRemove welding slag, rust, and other debris from the pipeline to prevent wear on the sealing surface when the medium flows.

Verify parametersEnsure that the nominal pressure (PN) and diameter (DN) of the valve match the pipeline system, and that the flange connection dimensions comply with GB/T 9113 or HG 20592 standards.

Installation steps

flange connection：

Using flexible graphite and stainless steel gaskets (GB/T 12221 standard), evenly tighten the bolts (material 35CrMoA, in accordance with A193-B7 standard) to avoid deformation of the valve body.

Ensure that the valve flow direction label is consistent with the medium flow direction. If horizontal installation is required, the handle should be placed facing upwards or horizontally for ease of operation.

welding connection(If applicable):

Remove the sealing ring (PTFE material) before welding to prevent high temperature damage; Clean the welding slag and reinstall the sealing ring after welding.

Installation of drive device：

Worm gears or electric actuators should be coaxial with the valve stem to ensure smooth rotation and no jamming.

Check after installation

Manually rotate the handle 90 ° to confirm that the ball opens and closes flexibly without any abnormal resistance;

Conduct a shell test (with a test pressure of 1.5 times the nominal pressure) and a sealing test (with a test pressure of 1.1 times the nominal pressure), and hold the pressure for 30 minutes without any leakage.

Long term use precautions

Media compatibility：

PTFE sealing rings are suitable for neutral media such as water, solvents, and gases to avoid long-term contact with highly corrosive media (such as concentrated nitric acid).

Operating Specifications：

Do not use an extended lever to forcefully open or close the valve to prevent the valve stem from bending or the ball from deforming.

When controlling remotely, ensure that the output torque of the actuator matches the rated torque of the valve (refer to the design standard GB/T 12237).

Disable protection：

Before long-term shutdown, it is necessary to empty the pipeline medium, close the valve, and apply anti rust oil; If the storage environment is humid, it is recommended to ventilate regularly.

Suggestions for maintenance tools and spare parts

tool: Wrench (matched with 35 # nut, A194-2H standard), seal ring extractor, torque wrench (set tightening torque according to nominal pressure).

Vulnerable spare partsPTFE sealing ring, flexible graphite gasket, valve stem packing (PTFE material).

Through standardized installation and regular maintenance, the Q41F floating soft seal ball valve can achieve long-term stable operation, extending its service life to 8-10 years (depending on operating conditions).