Relief Valve Of A Reasonable Choice Is The Key To Ensuring The Safety Of Pressure Vessels Work

2015-01-22 11:20:46 Read：

Relief Valve Confused With Other Safety Devices Use A Lot Of People Think That There Is A Pressure Gauge On The Pressure Vessel, It Is Not Necessary To Set Up The Relief Valve. It Is Well Known That The Pressure Gauge Indicating Pressure Value Only. No Overpressure Protection Role. Electrical Automatic Protection Device Cannot Completely Replace The Relief Valve, Because Will Not Work In A Power Outage, Line Fault.

Safety Valve Is A Kind Of Automatic Valve, And The Need To Manually Open And Close The Stop Valve, Drain Valve. In Compression Equipment Under The Condition Of Overpressure, Automatically Open, Drain Off Excess Of Media, Ensure The Equipment Safety, When The Pressure To The Specified Value, Can Automatically Shut Down And Seal Recovery. So The Relief Valve Is One Of The Most Basic Mechanical Protection Device. The Relevant Rules And Regulations, In The Pressure Vessel Must Be Installed On The Relief Valve, Otherwise The Safety Of Pressure Vessel Is Difficult To Guarantee. Conceptual Understanding The Safe Hidden Trouble That May Cause A Lot Of People Don't Know About The Concept Of Safety Valve Of "Pressure", So That When The Choose And Buy, Use Safety Valve Difficult, Thus Cause Potential Safety Hazard.

The "Pressure" In The Relief Valve Specifications Are: Nominal Pressure And Work Pressure. Nominal Pressure Refers To The Relief Valve In The Stipulated Below 200 ℃, The Highest Working Pressure, Is An Important Basis For The Normal Temperature Water Pressure Strength Test, Its Code Is PN, Unit Is MPa. When The Relief Valve Working Temperature, Due To The Material Strength Decreased With Temperature, The Actual Allows The Use Of Work Pressure Decreases With The Rise Of Temperature, And All Products Must Follow The Principle Of Heating Decompression, In Countries With Strict Rules And Regulations. Nominal Pressure Class Divide, With Reference To The Pressure Vessel Classification Rules To Develop In Our Country.

Safety Valve In Addition To Guarantee The Opening Pressure Value, It Also Requires The Discharge Pressure, Opening Height, Back Pressure, Etc To Meet The Prescribed Requirements. In Order To Ensure The Safety Valve Action Feature Requirements, Every Spring Can Only Work Within A Certain Range Of Pressure, This Is The Pressure Relief Valve, The Pressure Level Here Refers To The Opening Pressure Range. Therefore, Within The Scope Of The Relief Valve Different Opening Pressure Choose Different Stress Level Of Spring. If You Don't Order On Nominal Pressure Relief Valve For Pressure Level, The Spring Pressure Level Range Is Wrong, Can't Use, Have To Change, Both Hold Up Production, And Increase The Unnecessary Spending. In Addition, Considering The Spring Desquamate Oxidation During Heat Treatment, In Such Factors As Selection Pressure Level Should Be To Limit.

According To Conditions Of Use Safety Valve Must First Know What Relief Valve Installed In The Equipment, What Medium, Operating Temperature, How Much Pressure, Need To How Much Capacity. Safe And Reliable, Economic And Reasonable Is The Main Principle. Steam System, It Will Not Be Closed With A Wrench And Safety Valve; Liquid Medium And Small Gas Capacity Device, With Tiny Qi Safety Valve; High Temperature Medium, Safety Valve With Radiator; Flammable, Toxic Medium, With Closed Valve. Relief Valve Type And Specification Of The Determination Of Conventional Valve Type According To Compile JB308-75, It Fully Reflects The Valve Connection Mode, Structure Type, Nominal Pressure, Body And Sealing Surface Materials, Etc. Understand The Valve Model Establishment Method, Regular Users Will Know Choose The Valve Is In Accordance With The Requirements. Of The Specifications Of The Valve According To Import Size, Expressed In The DN. According To The Working Temperature, Medium, The Opening Pressure And Emissions And Rated Capacity Coefficient Is Calculated, And Can Determine The Runner Diameter And Nominal Diameter. Valve According To JB79-59 Law, Such As DN40, (, DN65, DN80, DN100, Etc. Pay Attention To The Same Specifications Of The Relief Valve, Due To The Type, The Export Is Not The Same Size. Raise Import And Export Of Safety Valve Size Is The Same, The Safety Valve For The Gas Expansion, Export A Size Larger Size Than Imports.