Metallic materials are procured according to the requirements requested by our
customers in compliance with the
technical specifications of the materials, the technical engineering specifications
of the projects, the control
plans, the type of certification.
We have in stock some materials that have a prevalence of use among carbon steels,
martensitic steels, stainless
steels, ferritic steels, super nickel alloys. Raw materials are presented as forged
rings, hot rolled rings,
stamped rings, in rolled or forged bars, in stamped and forged spheres.
All incoming steels are checked with PMI, measured, labeled and deposited in the
appropriate spaces assigned by
the computer system. The labels applied to the incoming materials show the data that
unequivocally attribute the
traceability of the same at any time, even after the processed and assembled parts
have been processed.
At the start of the very first processing phase, each detail is assigned a serial
number which is immediately
transferred to the pieces, together with the casting number and kept throughout the
production cycle.
At the end of the last processing phase, the details are marked with all the
requisites to guarantee traceability
such as the serial number, the material, the casting, the design code, the internal
order number and anything
else that may be requested by customers.
| Carbon Steels |
Martensitic/Austenitics |
Duplex |
Nickel Alloys |
| GRADE |
NOME |
GRADE |
NOME |
GRADE |
NOME |
GRADE |
NOME |
| A105/A105N |
ASTM A105 |
17.4PH |
ASTM A564 |
GR 4A |
ASTM A995 |
INCONEL 825 |
ASTM B564 |
| F60 |
ASTM A694 |
F304/304L |
ASTM A182 |
F51 |
ASTM A182 |
INCONEL 625 |
ASTM B564 |
| LF2 CL1 |
ASTM A350 |
F316/316L |
ASTM A182 |
F53 |
ASTM A182 |
INCONEL 725 |
ASTM B637 |
| LF3 |
ASTM A350 |
F44 |
ASTM A182 |
F55 |
ASTM A182 |
MONEL K500 |
ASTM B564 |
|
|
F6A CL2 |
ASTM A182 |
F59 |
ASTM A182 |
CW6MC |
ASTM A494 |
|
|
|
|
CellF60 |
ASTM A182 |
CU5MCUC |
ASTM A494 |
Thermoplastic materials are used for the production of rigid inserts to be mounted on
seats with soft sealing. The use of the inserts amply satisfies the need for a safe
seal in the field of multiple valve applications. Each type of material has its own
mechanical, chemical and physical characteristics such as to guide the choice of the
thermoplastic suitable for use at certain pressures, operating temperatures, for the
passage fluids of the valves. Technopolymers are also used for the production of
anti-extrusion rings, energized collars, other thermoplastic gaskets. The rigid
thermoplastic inserts are labeled with the evidence of the requirements strictly
linked to traceability (date and purchase order, material, dimensions),
including the labeling of the commitments of each individual internal order and
deposited in an air-conditioned and darkened environment.
| ENGINEERED PLASTIC |
|
DEVLON V-API |
NYLON 6 |
6 NYLON MOS2 |
PA12 (NYLON12) |
POM |
| TEMPERATURE SUITABLE(°C) |
-40 to 170 |
-40 to 90 |
-40 to 130 |
-60 to 80 |
-50 to 85 |
| PRESSURE SUITABLE(PSI) |
150-2500 |
150-1500 |
150-1500 |
150-900 |
150-900 |
| HARDNESS (Shore D) |
78-80 |
78-80 |
79-82 |
60-67 |
94 |
| TENSILE STRENGTH(MPa) |
80 |
80 |
60 |
52 |
67 |
| FLUOROPOLYMERS |
|
PTFE |
RPTFE |
VIRGIN PEEK |
PEEK (PTFE FILLED) |
PCTFE |
| TEMPERATURE SUITABLE(°C) |
-100 to +100 |
-100 to +120 |
-100 to +260 |
-100 to +260 |
-250 to +150 |
| PRESSURE SUITABLE(PSI) |
150-300 |
150-600 |
150-2500 |
150-2500 |
150-1500 |
| HARDNESS (Shore D) |
55-60 |
58-65 |
85-90 |
90-95 |
75-80 |
| TENSILE STRENGTH(MPa) |
32 |
18 |
97 |
85 |
40 |
The surface treatment of nickel plating is widely used to protect steel from oxidation and to give high
resistance to corrosion and wear.
In the chemical nickel plating process (ENP) a phosphorus content 10
(properly called high phosphorus) is used.
Deposition occurs by chemical reaction in order to obtain a uniform coating regardless of the geometry of the
components to be treated. The components subjected to surface treatment of nickel plating are supplied with
thicknesses of 25-30 microns, 50 microns, 75-80 microns, on request.
With the high phosphorus chemical nickel plating, an average hardness of 500-600 Vickers is reached. The hardness
increases when, after the nickel deposit, heat treatments are carried out at temperatures between 280 ° C and 400 °
C with permanence in the oven for pre-established times up to 800 - 1000 HV.
Furthermore, after nickel plating it is advisable to carry out the dehydrogenation heat treatment in order to improve
the adhesion of the nickel deposit. The certification includes basic controls (thickness test, hardness) and
additional controls (metallographic section, alloy composition, salt spray, ferroxyl, bend test, etc.), if required.
The ENP process is performed according to different standards such as ASTM B733, ASTM B571, ASTM B117, ASTM B689,
ASTM B602, ISO 4527 etc.
Coating with Tungsten Carbide, Chromium Carbide, Stellite is widely used for metal seal seats and
balls.This coating takes place through the HVOF (HighVelocity Oxygen Fuel) process which, exploiting
the high speed, projects the carbide particles into the sealing areas and allows to reach a high adhesion
force, a hardness of 1400 HV and a low porosity. . The feasible thicknesses are mainly 150 µ, 200 µ, 400 µ,
according to the use characteristics of the valves.
After the coating, the seats and spheres are subjected to a grinding process of the treated areas until a
high degree of finish (0.2) is obtained in order to reach the required degree of thickness, and then move on
to adapt the seats with the ball by Lapping Process.
