Gost Standard Bi-Directional Butterfly Valves
- Aug 17, 2018
- Hits: 45
The standards are as below, Design and Manufacture：EN593 Face to Face：EN558 Test and Inspection：EN12266-1 Flange Dimensions:GOST 54432 At present, we make GOST standard Bi-directional butterfly...
DIN standard Lug Type Butterfly Valve
- Aug 17, 2018
- Hits: 37
Design and Manufacture:EN 593 Face to Face：EN558 Flange Dimensions:EN 1092-1 Test and Inspection：EN 12266-1 The lug type butterfly valve has the same Face-to-Face as wafer type. It also has the...
The structure of valve seat for bi-directional butterfly valve
- Aug 17, 2018
- Hits: 96
For bi-directional butterfly valves of small size or low pressure application, they usually have seat ring of same structure as uni-directional butterfly valves. But joint dimensions for some parts are...
How to distinguish uni-directional butterfly valve from bi-directional butterfly valve
- Aug 17, 2018
- Hits: 750
Based on our experience, the following tips can help customers to distinguish butterfly valves from uni-directional or bi-directional structures. 1. For some factories, they put two flow arrows on the...
The Advantages of Metal -to- Metal Butterfly Valve
- Aug 17, 2018
- Hits: 20
The common triple-eccentric butterfly valve has a seal ring composed of two or more layers of metal sheets and non-metal sheets, and is fixed on disc by pressing ring and bolts. The butterfly valve...
The Classification of Bi-directional Butterfly Valves
- Aug 15, 2018
- Hits: 30
According to the connection ends, there are major four types: flanged ,butt welded , wafer and lug type, of which flanged butt welded types are the most common ones. According to the operation, the valve...
The installation instruction for JONLOO Bi-directional butterfly valves
- Aug 15, 2018
- Hits: 33
Bi-directional butterfly valve, as the name implies, the butterfly valve can seal at both directions. The ordinary triple-eccentric butterfly valve only seal at one direction,and withstand the pressure...
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Duplex stainless steel 2205 material for butterfly valve
- Aug 15, 2018
- Hits: 48
For duplex stainless steel 2205,its corresponding casting grade is 4A. There is also 2507, and casting grade 5A. The duplex stainless steel 2205 and 2507, are commonly used in seawater and...
JONLOO Bi-directional Butt Weled A105 Butterfly Valve
- Aug 15, 2018
- Hits: 19
JONLOO supplies Bi-directional Butt Weled Butterfly Valve. The valve body is forged steel A105 and disc cast steel, with floating seat to be di-rectionally sealing. Not all parts of this butterfly...
JONLOO Bi-directional Butt Welded Butterfly Valves
- Aug 15, 2018
- Hits: 22
For big size,the valve body is Q235, a kind of steel plate. Compared with the casting, it has no blister, thus causes no leakage on the valve body . The upper and lower necks are welded , and can be given...
What is the Difference between JONLOO Rising Stem Gate Valve and Non-rising Stem Gate Valve?
- Aug 07, 2018
- Hits: 13
There are mainly two types of gate valves in the market – the rising stem gate valve and non-rising stem gate valve. Maybe you are now in a dilemma and don’t know how to make a choice....
JONLOO OS&Y Gate Valve ready for dispatch
- Jul 06, 2018
- Hits: 33
Gate valves operate by opening or closing a passageway to manage fluid flow. You use an O S & Y gate valve mainly to control water flow, and you commonly find it in municipal and industrial water...