Designed and manufactured in Badalona since 1962
Custom valve design
If you cannot find the valve you need in our catalog, we study your application and adapt an existing valve or design a custom one, for steam, liquids, or gases. We start from our reducing, relief, and control valves and change whatever your process requires.
- FluidsSteam, liquids, and gases
- Materials316L stainless, CF3M, WCB, bronze duplex and super duplex on request
- ConnectionsEN and ANSI flanges, threaded clamp and weld ends on request
- StandardsPED · ATEX · ISO 9001
Do you have a special application? Call 933 720 888 or email valfonta@valfonta.com.
How we work
- You tell us about your application. Fluid, function, pressures, flow rate, connection, and regulatory requirements.
- We study your case. We look for the catalog model that fits or the on-request options you need.
- We propose a solution. A standard model, one with on-request options, or a purpose-built design.
- We manufacture and test. In our Badalona workshop, with a serial number for spare parts and certificates.
- In-house design and manufacturing in Badalona
- ISO 9001:2015 quality system
- PED quality system to Module D1
- ATEX certificate for custody of the technical file
Starting families
Almost every custom design starts from one of our families. Each datasheet shows which options are available on request.
8 models
Pressure reducing valves
They keep downstream pressure constant with no auxiliary power.
Sizes
DN8 to DN150
Inlet
up to 40 barg
On request
duplex, super duplex, weld ends
6 models
Pressure relief and excess pressure
They discharge excess pressure from a line or a piece of equipment.
Sizes
DN15 to DN150
Set pressure
0.01 to 20 barg
On request
bronze, duplex, super duplex
Pneumatic actuator
Control valves
The C1 provides modulating or ON/OFF control according to the process signal.
Sizes
DN15 to DN100
Kv
3.5 to 130 m³/h
On request
DN125, DN150, reduced Kv
Custom set pressure
Safety valves
Supplied preset to the pressure you specify.
Models
ALPER, JAS, and 368–371
Sizes
¼″ to 4″
Temperature
up to 280 °C
What we design and the data we need
Valfonta has designed and manufactured pressure control valves in Badalona since 1962. Beyond the standard catalog, we adapt and design custom valves for steam, liquids, or gases to meet each customer’s requirements: pressure reducing valves, pressure relief valves, and other control valves.
Many adaptations are already listed in the datasheets as on-request options: a different body material, connection, or gaskets, a reduced Kv, or a different pressure range. If your case goes further, we study your needs until we find the right valve for your installation. On our blog we explain what custom valves are and cover the basics of designing a pressure valve.
The data we need from you
To study your case, the more complete the initial information, the better. This is what we will ask you for:
- The fluid. Steam, liquid, or gas, its minimum and maximum temperature, and any special features: for example, whether it is oxygen or a mineral oil.
- The function. Reducing pressure, discharging excess pressure, or regulating from a control system. In the latter case, the signal type and the fail-safe position (normally closed or normally open).
- The pressures. The maximum and operating inlet pressure, and the outlet pressure or set pressure you need.
- The flow rate. The maximum and minimum flow rates, or the Kv if you have already calculated it.
- The installation. The pipe size, the connection type, and the material required by your process or your internal standards.
- The requirements. If the valve will be installed in an ATEX zone or needs CE marking under the Pressure Equipment Directive, tell us from the start.
With that data, we will propose a catalog model, a model with on-request options, or a purpose-built design.
What we can adapt
These are the on-request options already listed in our datasheets and catalogs, with the models they apply to.
Body material
Duplex or super duplex in the PRV20, PRV30, PRV44, PRV45, VD, M1, and M2 reducing valves and in the PRV53, PRV54, PRV55, S1, S2, and S3 excess pressure valves. RG10 bronze body on the excess pressure and relief valves. Monel or bronze internals on the M1 and bronze on the VD. The C1 in stainless steel construction.
Connections
Weld ends (socket weld or butt weld) across the entire range of reducing and excess pressure valves and on the C1. Clamp connection on the PRV30, PRV44, PRV45, PRV53, PRV54, and PRV55. BSP or NPT thread on the C1.
Gaskets, plugs, and diaphragms
EPDM, PEEK, Viton, or Aflas gaskets on the PRV30 and PRV44, and NBR or FKM for mineral oils on the PRV54. PEEK, EPDM, FKM, or NBR plug on the M2F and the S3, and stellited on the C1. PTFE diaphragm on the M2 and S2.
Kv and port
Reduced or special Kv on the PRV20, PRV30, PRV44, PRV45, PRV53, PRV54, PRV55, M1, M2, S1, and S2. On the C1, Kv from 0.1 m³/h and reduced port; on the S3, reduced port.
Pressure and temperature ranges
Special outlet ranges on the M2F, set pressure from 5 to 15 barg on the PRV53, and a 350 mm actuator, on request, on the PRV45 (millibar ranges) and the PRV55. On the C1, finned bonnet and graphite packing up to 350 °C, or extended bonnet below −5 °C; on the S3, up to 250 °C with special gaskets.
Special services and accessories
Degreasing for oxygen service on the PRV30, PRV44, PRV53, and PRV54 (the PRV55 is always supplied degreased). Stainless steel actuator on the M2, S2, and PRV55. On the C1, anti-cavitation and low-noise cage, 4–20 mA positioner, and handwheel.
If the adaptation you need is not listed here, tell us about your case anyway: we will study it with you.
Standards and certificates
PED 2014/68/EU
Quality system certified to Module D1. Depending on size, pressure, and fluid, each valve may or may not carry CE marking.
ATEX
Custody of the technical file for reducing valves and for excess pressure, relief, and pneumatic control valves. Many datasheets include II 2 GD marking.
ISO 9001:2015
Design, manufacture, and sale of globe control valves for process control.
View and download Valfonta’s certificates.
Frequently asked questions about valve design
What is a custom valve?
It is a valve adapted to a specific application when the standard model does not fit: with a different material, connection, gaskets, Kv, or pressure range, or designed specifically for your process.
What fluids can custom valves handle?
Steam, liquids, and gases. For oxygen, several models are supplied degreased on request, and specific gaskets are available for mineral oils.
Do you make valves in super duplex?
Yes. Duplex and super duplex are offered on request in the PRV20, PRV30, PRV44, PRV45, VD, M1, and M2 reducing valves and in the PRV53, PRV54, PRV55, S1, S2, and S3 excess pressure valves.
What special connections can be ordered?
Weld ends (socket weld or butt weld) on reducing valves, excess pressure valves, and the C1, and clamp connection on several small-size stainless steel models (PRV30, PRV44, PRV45, PRV53, PRV54, and PRV55).
Do custom valves comply with PED and ATEX?
Valfonta’s quality system is certified to Module D1 of Directive 2014/68/EU, and CE marking depends on size, pressure, and fluid. If the valve will be installed in an ATEX zone, tell us when you order it. See our certificates.
What data do you need to study my case?
The fluid and its temperature, the valve’s function, the inlet and outlet pressures or set pressure, the maximum and minimum flow rate, the connection and material, and the regulatory requirements. The more complete they are, the sooner we can propose a solution.
Related technical guides
Other families: Pressure reducing valves · Pressure relief valves · Control valves · Safety valves · Ejectors · Injectors
Tell us which valve you need
Describe your application and we will propose a catalog model, the on-request options you need, or a purpose-built design.
- Fluid and operating temperature
- Valve function and inlet and outlet pressures or set pressure
- Maximum and minimum flow rate (or Kv)
- Connection, material, and regulatory requirements (PED, ATEX)
You can also call 933 720 888.
