Dec 22

How to replace the valve seat and sealing element

As machinery products, after long time use, there will be some problems of ball valves. If there are problems appeared on valve sear or sealing element, then how to replace them?

  1. First of all, you need to dismantle them.

Keep the ball valves in a state of half-opened, then clean and eliminated the dangerous materials may existed in or outsider the valves. Then next, close the ball valves, and take down the connecting bolt and nut. Dismantle the actuating device according to follow orders – executive body, attachment bracket, gasket used to prevent loose, valve-stem nut, butterfly shrapnel, glam, wear plate, and valve rod padding. Next step is to dismantle the connecting screw and nut of body cover, separate the valve cover and valve body. Then ensure the ball is in the state of turn-off, take out the valve seat.

During the dismantling, be careful to avoid the scratch on valve rod surface and sealing part.

  1. reassemble the ball valves

First clean and check the components which have been dismantled, I recommend you to replace the valve seat and other sealing components. During the assembling, do follow the order which is opposite of dismantling. Use the specified torsion to lock the connecting bolt of flange and valve-stem nuts. After assembled the executive body, make the valve to the state of open or close.

During the dismantling and assembling of ball valves, you should be careful to avoid scratch.

Dec 22

Classifications of plastic extruder

The development of plastic extruder is a long history. The machine in nowadays has a large demand. In order to meet the market demand, with the development of technology, plastic extruder has been developed to various kinds.

According to the quantity of screws, the plastic extruder can divided into single screw extruder, twin-screws extruder, multi-screws extruder and non-screws extruder and so on. The single screw plastic extruder is most extensively used at present; it is suiting in the extrusion processing of general materials. Twin-screws plastic extruder also has an important function in the market owing to its various advantages. The advantages of twin-screws extruder are followed: the quantity of heat caused by friction is less, the cut of materials is relatively uniform, the deliver ability of screw is large, the extrusion quantity is relatively stable, the stay time of materials in the cylinder is long and the mixing is uniform.

The single screw plastic extruder occupies an important place whether it is regarded as Plasticizing granulation machinery or Processing machinery. In recent years, single screw extruder has a large development. The twin-screws plastic extruder has the better funticons of mixing, exhausting and self-cleaning. On the basic of twin-screws extruder, the multi-screws plastic extruder is appeared in order to process the blending materials which has bad heat stability.

Different types of plastic extruder can meet different processing, to produce the plastic productions can meet the requirements.

Dec 22

Shopping Basket Stands

 Shopping Basket Stands Description

Payment & Shipping Terms
Payment Term: L/C
MOQ: 100 Piece/Pieces
Means of Transport: Ocean
Supply Capacity
Production Capacity: 8000P/M
Packing: air bubble film…
Delivery Date: In 3 month
Product name:Shopping Basket Stands

Item:SPEC
Size:W410*D562*H1346mm
Weight:3.0kg
Surface treatment:Japanese import PP powder (plastic diped),galvanizd ,chrome plated

Detail & Size Images:


Nov 15

car door handle mould

car door handle mould Description

Payment & Shipping Terms
Payment Term: T/T,L/C
MOQ: 1 set
Means of Transport: Ocean
Supply Capacity
Production Capacity: 800
Packing: wooden
Delivery Date: 50-75days

Product Name:car door handle mould
Place of Origin: Huangyan, China
Trademark:ZHONGYA MOULD
Mould Steel: S45C, P20, 718, 718H, 2738, 738H, NAK80,SKD61,E420,etc.(For Reference)
Mould Base: LKM or Self-made.
Hot Runner: YUDO, HASCO,M-H-R, etc.(For Reference)
Mould Components: HASCO, DME, PUNCH, JINHONG,etc.(For Reference)
Main Softwares: Autocad, UG, Catia, Solidworks, etc.
Packing: Wooden
Lead Time : 50-75days

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Category: Plastic handle