High Precision Choke Stem Provides Optimum Good Performance In
Erosive Conditions
Basic parts of control valves
A valve is a mechanical device that controls the flow of fluid and pressure
within a system or process. A valve controls system or process fluid flow and pressure by performing
any of the Following functions.
a) Stopping and starting fluid flow
b) Varying (throttling) the amount of fluid flow
c) Controlling the direction of fluid flow
d) Regulating downstream system or process pressure
e) Relieving component or piping over pressure
There are many valve designs and types that satisfy one or more of
the functions identified above. A multitude of valve types and
designs safely accommodate a wide variety of industrial
applications.
Tungsten Carbide Materials Grade As Below:
| Zonco Grade | Density
(g/cm3) | Hardness (HRA) | TRS
(≥N/mm²) |
| ZK11 | 14.2-14.4 | 87.1 | 2600 |
| ZK15 | 13.95-14.15 | 87 | 2600 |
| ZK20 | 13.45-13.65 | 83.5 | 2600 |
| ZK06 | 14.8-15 | 90 | 2100 |
| ZK06A | 14.85-15 | 91 | 2000 |
| ZK08 | 14.65-14.85 | 89.5 | 2000 |
| ZY20C | 13.4-14.6 | 82.5 | 2700 |
Valve Trim
The internal elements of a valve are collectively referred to as a valve’s
trim. The trim typically includes a disk, seat, stem, and sleeves
needed to guide the stem. A valve’s performance is determined by
the disk and seat interface and the relation of the disk position
to the seat.
Because of the trim, basic motions and flow control are possible.
In rotational motion trim designs, the disk slides closely past the
seat to produce a change in flow opening. In linear motion trim
designs, the disk lifts perpendicularly away from the seat so that
an annular orifice appears.
Products show
| Common Alloy Grades, Ghysical Mechanical Properties And Recommended
Application |
| Grade | WC% | Co/Ni % | Physical and mechanical properties | Grain size (μm) | Recommended application |
| Density (g/cm3) | TRS (N/mm2) | Hardness (HRA) |
| ZG01 | 100 | 0 | 15.3-15.5 | 1200 | 95.5 | 0.3 | Ultra-high hardness, high wear resistance, anti-corrosion, with
certain anti-destructive ability |
| ZG04X | 96 | 4 | 15.0-15.2 | 1600 | 92.8 | 0.8-1.0 | Suitable for drawing die, non-ferrous metal wire drawing and
wear-resistant parts |
| ZG06 | 94 | 6 | 14.8-15.1 | 2500 | 90.0 | 1.2 | Good abrasion resistance, good compression resistance, suitable for
wear-resistant parts that resist abrasion and high pressure. |
| ZG06X | 94 | 6 | 14.8-15.1 | 2400 | 91.5 | 1.0 | Superio wear resistance,good comprehensive properties,suitable for
making non-standard structure components with higher wear
resistance. |
| ZG06A | 94 | 6 | 14.8-15.1 | 2150 | 92.5 | 0.6-0.8 |
| ZG08 | 92 | 8 | 14.6-14.9 | 2700 | 89.0 | 1.2-1.6 | Good general performance, used for general wear parts, molds,
general tools, etc. |
| ZG10.2 | 90 | 10 | 14.3-14.6 | 3800 | 91.7 | 0.7 | Good general performance, suitable for casing and oil nozzle
products |
| ZG11 | 89 | 11 | 14.3-14.7 | 2800 | 88.5 | 1.2-1.6 | Anti-wear, anti-erosion, good comprehensive mechanical strength,
suitable for wear-resistant parts in the petroleum, chemical and
mechanical industries. |
| ZG12X | 88 | 12 | 14.2-14.5 | 3000 | 89.5 | 1.0-1.2 | Anti-erosion, good comprehensive mechanical strength, suitable for
impact-resistant wear-resistant parts, molds, and roller rings. |
| ZG15 | 85 | 15 | 13.8-14.2 | 3000 | 86.5 | 1.2-1.6 |
| ZG15X | 85 | 15 | 13.8-14.2 | 4500 | 89.0 | 0.7 | Excellent wear resistance and toughness,it is suitable for making
integral stamping dies, anti-vibration toolholders, etc. |
| ZG20 | 80 | 20 | 13.4-13.8 | 3100 | 85.0 | 1.0 | Excellent wear resistance and toughness |
| ZN06 | 94 | 6 | 14.5-14.9 | 2000 | 90.0 | 1.2 | Non-magnetic alloy, suitable for sealing ring, non-magnetic
wear-resistant parts and corrosion-resistant parts. |
| ZN09 | 91 | 9 | 14.3-14.6 | 2300 | 89.0 | 1.2-1.6 |
| ZN11 | 89 | 11 | 14.0-14.3 | 2600 | 88.0 | 1.2 |
