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Bags could made into various size and colors, and could also print with your
design or LOGO. The material could be HDPE / LDPE Virgin. The bags could
be in clear / White/ Black/ Red/ Green/ blue/Yellow/ Purple and so on. We could
make the bags into most color as shown in the Pantone Book.
Our certificates: ISO 9001:2008, and
BRC
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(1) GB12232-89 "General Valve Flange Link Iron Gate Valve"
(2) GB12234-89 "General Valve Flange and Butt Welding Connection Steel Gate Valve"
(3) GB8486-87 "General Technical Regulations for Connection of Internal-Threaded Gate Valves, Cut-Off Valves, Ball Valves, and Check Valves" (4) GB8465.1-87 "Basic Specifications for Internal Connection of Gate Valves, Cut-Off Valves, Ball Valves, and Check Valves gate"
(5) JB/T53162-94 Gate Valve Product Quality Classification
(6) JB/T5298-91 "Steel Plate Gate Valves for Pipeline"
(7) JB/Z243-85 "Valve Valve Static Pressure Life Test Procedure"
(8) JB/TQ648-88 "Fertilizer Plate Gate Valve with Iron"
(9) JB/T53200-94 "Product Quality Classification of Iron Valence Plate Valves"
(10) JB/T53242-94 "Steel Plate Gate Valve Product Quality Classification"
1. Principle The closing part (the gate) moves in the vertical direction along the centerline of the channel to do full-open and full-off cutting.
2. The gate valve is mainly used to cut off or connect the medium in the pipeline and is generally not used as regulation or throttling.
3, classification gate valve according to different classification methods can be divided into: parallel gate valve, wedge gate valve, lift gate valve, rotary rod gate valve, fast open and close gate valve, shrink gate valve, flat gate valve and so on.
4, characteristics of fluid resistance is small, the applicable pressure, temperature range, medium flow direction is not limited, good sealing performance. 
The main standard of gate valve
The main standard of gate valve