J41b carbon steel ammonia gas flange shut-off valve

J41b carbon steel ammonia gas flange shut-off valveProduct Introduction

J41b carbon steel ammonia flange globe valve is a specialized valve designed for the transportation of corrosive media such as ammonia and liquid ammonia. It adopts a new sealing structure based on the characteristics of domestic working conditions, and has the characteristics of stable sealing, corrosion resistance, safety and reliability. It successfully solves the problem of corrosion and leakage of ordinary valves in chemical pipelines, and is suitable for the transportation of ammonia, liquid chlorine and other media in industries such as chemical and refrigeration.

Core characteristics of flange globe valve for carbon steel ammonia use

Materials and Structural Design

Corrosion resistant materialThe valve body is made of corrosion-resistant steel (carbon steel with added corrosion-resistant alloy elements), which can withstand corrosion from ammonia and liquid ammonia, and can reach -40 ℃ in low temperature environments to ensure stable working conditions.

sealed structureAdopting a ball plane sealing pair pairing to achieve automatic sealing compensation and dual safety design, it solves the problem of poor sealing performance and easy leakage of ordinary valves; The sealing surface is made of Babbitt alloy to further improve sealing performance and service life.

Medium flange and packing sealThe middle flange adopts a mortise and tenon sealing structure to adapt to pressure fluctuations in the pipeline; The upper sealing device uses a multi-stage polytetrafluoroethylene combination seal to ensure that there is no medium leakage from the packing box.

Application and advantages of J41b carbon steel ammonia flange globe valve

Typical application scenarios

chemical industryChlorine gas and liquid chlorine pipeline transportation, storage and transportation of urea in fertilizer production.

refrigeration systemControl of the circulation system using ammonia as a refrigerant.

other fieldsIn places such as petrochemical and liquefied natural gas receiving stations that require precise control of the flow rate of corrosive media.

Product advantages

safe and reliableNo risk of internal and external leakage, solving the safety hazards caused by common valve shell perforation and packing box leakage.

easy to operateStructural design optimization, reducing opening and closing resistance, and facilitating daily maintenance.

Weather-resistantAdapt to high temperature, high pressure, and low temperature environments to meet long-term stable operation requirements.

Selection and Production Standards

model difference

According to the valve body material and pressure rating, common models include J41B-16C (cast steel), J41B-25Q (ductile iron), J41B-25K (malleable iron), etc., which need to be selected according to specific working conditions.

J41b carbon steel ammonia gas flange shut-off valveProduct installation and maintenance

Installation precautions

inspect the productBefore installation, it is necessary to check whether the product model, part number, and specifications match, and whether the parts of the whole machine are damaged or loose.

Pipe cleaningBefore installation, the pipeline should be cleaned, and there should be sufficient straight pipe sections and filters at the valve inlet. The flange connection between the valve body and the pipeline should pay attention to coaxiality.

Installation of shut-off valveBefore installing the shut-off valve, the pipeline should be cleaned first.

installation siteThe installation site should consider the safety of personnel and equipment, which is both convenient for operation and conducive to disassembly and maintenance.

Valve installation directionValves should be installed upright and vertically on horizontal pipelines. If necessary, they can be installed at an angle. Horizontal installation should be avoided as much as possible. In situations where the valve has a large self weight or vibration, a support frame should be used.

Direction of medium flowThe direction of medium flow should be consistent with the direction of the arrow on the valve body. The gas source should be dry and oil-free. Valves should be used in environments with temperatures ranging from -20 to 55 ℃.

maintenance measures

Clean the valveFor cleaning general media, simply rinse with water. But for cleaning media that are harmful to health, it is necessary to first understand their properties and then choose the appropriate cleaning method.

Valve disassemblyRemove rust from exposed surfaces of rusted parts first, but before rust removal, protect the machined surfaces of precision parts such as valve seats, valve cores, valve stems, and push rods.

Valve seat treatmentThe sealing surface has small rust spots and wear, which can be machined. If the damage is severe, it must be replaced.