PHC is the commercial brand of CALDITEC, highly specialised and focused on hydraulic and hydroelectric generation projects that require technical valves.
We have internally advanced technical knowledge, engineering, technical and human tools and resources to design and supply a comprehensive range of products commonly required in hydroelectric installations, guaranteeing optimal performance and high reliability.
As is usual in the hydroelectric sector, each valve is a unique product for CALDITEC. The main types of valves we offer are:
- Butterfly valves
- Ball valves
- Bypass and drain valves (needle and slide types)
Industry experience
CALDITEC, S.A.
Market presence: since 1993
Activity: Semi-heavy sheet metal work. Welding. Machining. Assembly. Testing.
Facilities: 4,000 m² of workshops + 200 m² of offices
Approvals: WPS-PQR acc. to ASME and UNE, ISO 9001, UNE 1090
Our engineering team's extensive experience in the design of this type of equipment, both in mechanical calculation and simulation using Finite Element Method (FEM) and fatigue analysis, allows us to offer reliable and safe products, generally intended for safety and emergency stop applications.
PHC It has its own know-how, engineering, and technical and human resources for the design and supply of all the products included in our product range.
PHC technology
Butterfly valves
Usually used as MIV for turbine or pump protection, as well as a penstock protection valve in the event of a sudden rupture of the pipeline.
Main characteristics of the valve
Size: from DN500 to DN3000 (other sizes upon request)
Pressure: from PN2.5 to PN40
Actuator
AD oil: cylinder (opening and closing)
SA Oil: cylinder (opening) – counterbalance (closing)
Electric
Manual (gearbox)
Valve materials:
- Body: S355 J2 + N (welded construction)
- Disco S355 J2 + N (welded construction)
- Axis AISI 431
- Joint (disc) EPDM 70 Shore A
- Seat (body): AISI 304L
- Bearings: self-lubricating (DEVA or similar)
Applications:
- Turbine protection
- Pump protection
- Penstock protection (with or without overspeed detector)
- Irrigation systems
- Dams
Additional valve features, options and accessories
Valve options:
- Body: The floor support can be removed.
- Disco solid or lattice disc, according to DN and/or PN.
- Bypass upstream connection to the valve body.
- Locking device: in closed position or in open and closed positions.
- Connections: venting, drainage, instrumentation and others.
Valve accessories:
- Bypass, including manual and automatic valve.
- Dismantling joint, 2 or 3-piece design.
- Overspeed detector using a mechanical paddle.
Documentation:
- Sizing and calculation report.
- FEA analysis of the main valve components.
- Material certificates.
- Factory acceptance test report.
- Maintenance manuals.
Ball valves
Ball valves are used as MIV for turbine or pump protection when the system operates at high pressures.
Main characteristics of the valve
Size: from DN300 to DN2500 (other sizes upon request)
Pressure: from PN10 to PN100 (other pressures on request)
Actuator
AD oil: cylinder (opening and closing)
SA Oil: cylinder (opening) – counterbalance (closing)
Electric
Manual (gearbox)
Valve materials:
- Body: S355 J2 + N (welded construction or forged steel)
- Rotor: S355 J2 + N (welded construction, cast or forged steel)
- Axis AISI 431
- Mobile seat: X3CrNiMo 13-4 – Tr
- Fixed seat (on the rotor): AISI 304L
- Bearings: self-lubricating (DEVA or similar)
Applications:
- Turbine protection
- Pump protection
- Penstock protection
- Dams
Additional valve features, options and accessories
Valve options:
- Body: 2-piece design (body + 1 lid) or 3-piece design (body + 2 lids).
- Seat: metal-to-metal (moving seat) or soft seat (HDPE), water or oil actuated.
- Number of seats: 1 service seat or 2 seats, for service and maintenance.
- Maintenance seat: mechanical locking device (wedges).
- Bypass upstream connection to the valve body.
- Locking device: in closed position or in open and closed positions.
- Connections: ventilation, drainage and instrumentation.
Valve accessories:
- Bypass, including manual and automatic valve.
- Dismantling joint, 2 or 3-piece design.
- Moving seats control panel.
Documentation:
- Sizing and calculation report.
- FEA analysis of the main valve components.
- Material certificates.
- Factory acceptance test report.
- Maintenance manuals.
Needle valves
Commonly used in bypass lines and as penstock drain valves.
Main characteristics of the valve
Size: from DN40 to DN500 (other sizes upon request)
Pressure: from PN10 to PN160
Actuator
AD oil: cylinder (opening and closing)
Oleo SA: cylinder (opening) – spring (closing)
Electric
Manual (gearbox)
Valve materials:
- Body: S355 J2 + N (welded construction or cast steel)
- Needle/stem (single piece for small sizes): AISI 431
- Seat: AISI 304L
- Gaskets EPDM
Applications:
- MIV bypass
- Penstock drainage
Additional valve features, options and accessories:
Valve options:
- Body: stainless steel body.
- Seat: available in various materials (stainless steel or bronze), depending on the design pressure.
Valve accessories:
- Limit switches for open and closed positions, mechanical or inductive.
Documentation:
- Sizing and calculation report.
- FEA analysis of the main valve components.
- Material certificates.
- Factory acceptance test report.
- Maintenance manuals.
Spool valves
Slide valves are used in bypass lines and as penstock drain valves when an axial jet and a more compact solution are required.
Main characteristics of the valve
Size: from DN50 to DN500 (other sizes upon request)
Pressure: from PN10 to PN160
Actuator
AD oil: cylinder (opening and closing)
Oleo SA: cylinder (opening) – spring (closing)
Valve materials:
- Body: AISI 316L / AISI 304L
- Shirt: AISI 420
- Seat: X3CrNiMo13-4
- Piston seals: PTFE + T-NBR
- Guide strips: nitrile / PTFE-Bz
- Stem seals: PU
Applications:
- MIV bypass valve
- Penstock drainage
- Ancillary services
Additional valve features, options and accessories
Valve options:
- Body: Floor stand.
- Actuator oil or water drive.
- Materials: other combinations on request.
Valve accessories:
- Limit switches for open and closed positions, mechanical or inductive.
Documentation:
- Sizing and calculation report.
- FEA analysis of the main valve components.
- Material certificates.
- Factory acceptance test report.
- Maintenance manuals.
Other valves
CALDITEC also offers reliable solutions for other hydraulic applications beyond those described above. We have extensive experience in the design and manufacture of hollow jet valves (Howell-Bunger and axial/plunger types), suitable for applications such as:
- Dam bottom outlets.
- Release of ecological flow.
- Hydropower station bypasses.
- Flow control, with energy dissipation where necessary.
Extensive experience focused on delivering bespoke engineering solutions that meet the specific requirements of each project.
PHC Projects
