DURLMARK – BLOG

Passivation Process and Features of Stainless Steel Flanges

By Durlmark Industrial | Jul 11,2017

Stainless steel flanges have excellent corrosion-resistant performance in water with different qualities, even under the ground, due to thin but solid oxidation film.

Flow Characteristics of Control Valve

By Durlmark Industrial | Jul 11,2017

Flow characteristics of control valve refers to the relationship between valve opening size and relative flow of medium under the conditions that a valve maintains constant differential pressure.

Some Proposals for SS Pipe Procurement

By Durlmark Industrial | Jul 10,2017

1. Various performance indicators (mechanical properties, wall thickness, surface): in fact, as a seller, it is good enough to know what is the material and surface of goods.

The Processing and Welding of Stamping Elbow

By Durlmark Industrial | Jul 10,2017

Stamping elbow, whose full name is stamping welding elbow, is produced through using pressing tool to make the board having the same material with the pipe become a half block of annular elbow and then weld the two half elbow together.

Features and Forging Processes of Flat Welding Flanges

By Durlmark Industrial | Jul 10,2017

Flat welding flanges save space, reduce weight and have good sealing performance due to no leakage design in joint area.

Useful Ways to Prolong the Service Life of Ceramic Valves

By Durlmark Industrial | Jul 10,2017

Two-piece structure is the earliest infrastructure of ceramic valves. During the use, however, we found that this structure is not reasonable, so later we developed three-piece structure and it is often used on double seat valves.

The Present Situation of Sanitary SS Pipe

By Durlmark Industrial | Jul 09,2017

With constant development of the national economy construction, the stainless steel tube is more and more widely used in all kinds of industries.

Advantages and Features of Stainless Pipe Cap

By Durlmark Industrial | Jul 09,2017

Stainless pipe cap,is also known as pipe plug or pipe cover. The major function of pipe cap is welded in pipe end to cover the pipe with the same function as pipe plug.

Introduction and Features of Flanged Butterfly Valves

By Durlmark Industrial | Jul 09,2017

The connection types of butterfly valves can be divided into three kinds: flanged connection, wafer connection and welded connection, which users can select based on specific pipeline requirements.

Some Knowledge about Butterfly Valves

By Durlmark Industrial | Jul 09,2017

When rubber seal butterfly valves are used to throttle the flow, improper measures will produce cavitation and make the rubber seat flake or damaged.