1, according to the distinction between hot and cold:
“Cold” and “Hot” (differentiated by blue and red signs) The same type of cold and warm triangle valves in the same model are mostly the same without essential difference. The main purpose of distinguishing between cold and warm is: hot and cold signs, mainly It is to distinguish which is hot water and which is cold water. Only some low-end slow-opening triangle valves are rubber ring spools, and the rubber ring material cannot withstand 90 degrees of hot water, and it needs to be divided into hot and cold.
2, according to the way to open:
“Quick open” and “slow open”. Quick opening means turning the valve on and off 90 degrees quickly. Slow opening refers to the 360 degree non-stop rotary angle valve handle to open and close the valve. Now basically use quick opening.
3, according to the valve core:
Ball valve core, ceramic valve core, ABS (engineering plastic) valve core, alloy valve core, rubber rotary valve core.
1. Spherical valve core: The advantage of the spherical valve core is that the diameter is larger than the ceramic valve core, it does not reduce the water pressure and flow, and the operation is convenient (rotary 90 degrees can be fully open / fully closed), STH valve core is chrome plated of. The advantages of chrome plating are high hardness and wear resistance, and the service life is long; avoiding the occurrence of patina. 2. ABS (Engineering Plastics): Plastic valve cores are low in cost and quality is not guaranteed.
3. Ceramic valve core: The advantage of the ceramic valve core is that the switch feels smooth and light. Applicable to the family, long service life and high cost. A ceramic spool is recommended.
4. Rubber rotary spool:
It has now been eliminated because opening and closing is very time consuming and laborious. At present, angle valves of this material are rarely used in the home.
5,according to the material of the shell:
Brass, alloy, iron, plastic.
Brass: easy to process, strong plasticity, hardness, strong resistance to bending and torsion.
Alloy: low cost, the disadvantage is that the bending resistance is low and the surface is easy to oxidize.
Iron: It is easy to rust and pollute the water source. It is not recommended in today’s society where environmental protection and low carbon are used.
Plastics: Low cost and not easy to use in the extremely cold north.