Rails Welding Cast on Shoulder for Track Fastening of Railway

  • Model NO.: 7120
  • Molding Style: Forging
  • Application: Railway
  • Heat Treatment: Normalizing
  • Forging Tolerance: +/-0.5mm
  • Certification: ISO 9001:2008
  • Trademark: Goliker
  • Specification: drawing
  • Processing Object: Metal
  • Molding Technics: Die Forging
  • Material: Steel
  • Surface Treatment: Sand Blasting
  • Standard: DIN
  • Steel: Carbon Steel, Alloy Steel
  • Transport Package: Shipping + Pallets
  • Origin: China
rails welding cast on shoulder
Trade Mark: Goliker
Manufacturing: Hot Forging
Material: carbon steel, alloy steel etc. 
Size: according to drawing
Standard: DIN, ASTM, BS, JIS, GB, AISI, ANSI, GOST
Heat treatment: to be decided as mechanical property request
Machining: optional
Surface treatment: plain, sand blasting, HDG, zinc plating, Dacromet, Black, Paint, Powder coating

Our main products are container accessories, railway accessories, construction forgings, hardware tools and power fittings.

Goliker has more than 10 engineers and technical staff. There are over 50 skilled forging workers and managers. Production facilities are fully equipped. We have 300 tons of electric screw presses, 400 tons of electric screw presses, 630 tons of electric screw presses, 1,000 tons of electric screw presses, and otherforging equipment and electric treatment furnaces. Other main equipment are a horizontal lathe, CNC lathes, machining device, drilling machines, grinders, cleaning machines, stamping machines etc., to provide customers from forging to final processing services. Goliker can produce and process various forms of forging blanks, finished products and semi-finished products, the annual output over10,000 tons. Friendly relations have been established with a number of large enterprises at home and abroad.

Swing check valves are the most common and best Check Valve for general-purpose use. Of all check valve designs, these valves produce the lowest pressure drop, when compared with other check valves of the same size. They feature a simple design that is easy to maintain.


The Swing Check Valve functions by allowing flow forces to move the disc from the closed position to the fully open position in a sweeping arc motion against the hinge-stop inside of the valve body. Due to the weight and center-of-gravity location of the disc and swing-arm assembly, the valve will return to the closed position should flow become interrupted or reversed. External counterweights mounted on the hinge pin are sometimes used to increase or decrease the reaction time and speed of the disc returning to the closed position. Seating surfaces are typically flat, which means the radial disc positioning onto the seat is not critical, except that it must be flat onto the seat. 


Swing check valve discs are not stable unless they are in systems with steady flow and are in the fully open position. As the disc/hinge assembly center of rotation is a fair distance from its pivot point, it will take a relatively long period of time for swing check valves to close upon flow stoppage or reversal. During this time, reverse-flow forces may experience a large increase in energy from flow and pressure buildup. This situation can cause high-energy water hammer when the disc slams onto the seat.


The Swing Check Valve can be enhanced with many options such as a lever and weight, which is designed to make the valve close faster and prevent slamming.

Swing Check Valve

Swing Check Valve, Non-return Valve, Cast Steel Check Valve Supplier, Stainless Steel Check Valve Manufacturer, Flanged Check Valve Manufacturer

Yongjia Kolink Valve Co., Ltd. , http://www.kolinkvalves.com

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