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7 types of flange sealing surface: FF, RF, M, FM, T, G, RTJ
Flanged butterfly valve has a flange on the valve, and bolts are used to connect the flanges at both ends of the valve to the pipe flange. Do you know all the 7 types of flange sealing surfaces? FF, RF, MF, M, T, G, RTJ The flange sealing surface basically has: Full plane: FF Raised […]
The difference between fluoroplastics PTFE and PFA
With the gradual popularity of PFA in the market, more and more customers are beginning to contact and understand this new material. Although I have a preliminary understanding, I am not very familiar with it. Customers still have many questions about this material. Recently, customers often ask about the difference between “soluble polytetrafluoroethylene (PFA)” and […]
The chemical composition, characteristics and applications of rubbers
Here we will introduce Rubber variety (abbreviated symbol) with their Chemical composition, Performance characteristics and Main application. 1. Natural rubber (NR) is mainly rubber hydrocarbon (polyisoprene), containing a small amount of protein, moisture, resin acid, sugar and inorganic salt. Large elasticity, high tensile strength, excellent tear resistance and electrical insulation, good wear resistance and drought […]
Classification and introduction of pipe thread-(3)
Sealing pipe thread (R) The basic dimensions and tolerances of inch sealing pipe threads Cooperate way There are two matching methods for inch seal pipe threads: cylindrical internal thread and conical external thread form a “column/cone” fit; conical internal thread and conical external threa d form a “cone/cone” fit. European countries mainly use “column/cone” matching […]
Classification and introduction of pipe thread-(2)
“Cylinder/cone” and “cone/cone”. Two inch seal pipe threads use different thread ring gauges (cylindrical thread ring gauge and tapered thread ring gauge) and thread plug gauge (the position of the datum plane is different, the two datum planes are different Half-tooth apart). Pipe threads that pass the inspection in European countries may be unqualified if […]
Classification and introduction of pipe thread-(1)
Pipe thread is a thread used for connection on the pipe wall to the valves. There are 55-degree unsealed pipe threads and 55-degree sealed pipe threads. Mainly used to connect pipes to make the internal and external threads fit tightly. There are two types which are straight pipes thread and tapered pipes thread. Common pipe […]
The structure and connection of the American standard valve
American standard valves mainly have API and ASME standards. ASTM and ASTM are material standards; valves designed, manufactured, produced and tested according to American standards are called American standard valves. The American standard valve is a control component in the fluid conveying system. It has the functions of cut-off, regulation, diversion, prevention of reverse flow, […]
The difference between carbon steel and cast steel
What is the difference between cast steel and carbon steel? First, steel is classified by chemical composition (1) Carbon steel: a. Low carbon steel (C≤0.25%) b. Medium carbon steel (C≤0.25~0.60%) c. High carbon steel (C≤0.60%) Steel is classified according to the forming method: (1) Forged steel (2) Cast steel (3) Hot rolled steel (4) Cold […]
Resilient seated socket end gate valve
GATE VALVE-resilient seated SOCKET END Standard: EN1074; EN1171 CAST IRON / DUCTILE IRON GATE VALVE SOCKET END NON RISING STEM Pressure: PN10 / PN16 Connection ends: Socked ends, for PVC pipes, uPVC pipes FACE TO FACE: ACCORDING TO BS, DIN, ANSI, AWWA, SABS STANDARD ETC. BODY:CAST IRON/DUCTILE IRON BONNET:CAST IRON/DUCTILE IRON WEDGE:CAST IRON/DUCTILE IRON, fully […]
Types and classifications of gate valves
Gate valve, also called plate gate valve, is mainly composed of valve body, bonnet, disc, valve stem, valve seat and sealing packing. It is one of the most common valve types in isolation valves. The main purpose of the gate valve is to cut off the fluid. For this reason, it is usually called a […]