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CBF S.r.l.
Pressure control valves

Pressure control valves

Product catalog summary

Overview

This document provides a comprehensive technical overview of pressure control valves manufactured by CBF s.r.l., designed for hydraulic systems to regulate and limit pressure, ensuring system safety and efficiency. It covers various valve types, construction details, calibration codes, adjustment mechanisms, operational parameters, and best practices for installation and maintenance.

Main Types of Pressure Control Valves

Relief Valves: Normally closed valves that maintain a constant pressure difference, adjustable over wide ranges to protect circuits from pressure spikes.
Dual Cross-over Relief Valves: Protect actuators from pressure spikes during rapid directional changes; suitable for symmetrical actuators, with additional components needed for asymmetric types.
Pressure Reducing Valves: Supply reduced, stable pressure to secondary circuits, adjustable via spring force and influenced by backpressure; include drain and optional check valves.
Sequence Valves: Enable sequential operation of two cylinders by opening at preset pressures; include check valves to prevent pressure summation.
High-Low Pressure Relief and Unloading Valves: Used in dual-pump circuits to unload the higher flow pump at set pressures, optimizing energy consumption.

Valve Construction and Features

Available as cartridge types with direct-acting or pilot-operated designs.
Features include differential pistons, pressure compensation, external drainage, and various adjustment mechanisms (external hex screws, handwheels, sealing caps, tamper-proof options).
Valve bodies made from aluminum or steel, affecting pressure ratings and corrosion resistance.

Technical Specifications and Parameters

Pressure Settings: Standard calibration codes (00, 01, 02, 03, sometimes 04) correspond to specific pressure ranges from 5 bar (72.5 psi) up to 350 bar (5000 psi), identified by spring color codes (Black, White, Yellow).
Flow Rates: Maximum flow capacities vary by model, typically from 5 l/min up to 130 l/min (2.7 to 34 gpm).
Pressure Increase per Turn: For pilot-operated valves, adjustment sensitivity ranges approximately from 12.6 bar (183 psi) to over 100 bar (1505 psi) per turn, enabling precise tuning.
Viscosity and Filtration: Recommended hydraulic fluid viscosity and absolute filtration levels are specified to maintain valve performance and longevity, though exact values are not detailed.
Operating Temperatures: Valves are designed to operate within standard hydraulic fluid temperature ranges.
Torque Requirements: Specified tightening torques for adjustment screws and caps ensure proper sealing and calibration.

Color Coding and Identification

Spring colors facilitate quick identification of pressure ranges:
- Black: Low to high pressure ranges (5-40 bar and 60-350 bar)
- White: Medium pressure range (20-100 bar)
- Yellow: Higher pressure range (40-250 bar)

Valve Models and Adjustment Codes

Model codes include calibration identifiers (00, 01, 02, 03) and adjustment types:
- A: External hexagon screw
- B: Handwheel and nut
- C: Sealing (piombatura) for tamper prevention
- D: Protective cap (cappellotto)
Valve series include VLP (pressure relief), RP (pressure reducing), VSQ (sequence valves), with variations for inline installation, anti-cavitation, and check valve integration.

Installation and Best Practices

Select valves based on actuator symmetry and circuit requirements.
Install anti-cavitation valves where necessary to prevent damage from fluid vaporization.
Maintain recommended oil viscosity and filtration to optimize valve function and durability.
Apply specified tightening torque during installation to avoid leaks and ensure accurate calibration.
Choose adjustment mechanisms appropriate for the application environment and maintenance needs.
Verify calibration codes and pressure ranges before installation to ensure compatibility with system demands.

Summary of Critical Parameters

Pressure ranges from 5 bar to 350 bar, with corresponding spring color codes for easy identification.
Flow capacities from 5 l/min to 130 l/min depending on valve model.
Multiple adjustment options allow precise pressure setting and secure installation.
Valve bodies available in aluminum or steel, influencing pressure ratings and corrosion resistance.
Recommended operating conditions include standard hydraulic fluid viscosities, temperature ranges, and filtration levels.
Pressure increase per turn data for pilot-operated valves enable fine tuning of pressure settings.

Manufacturer Information

CBF s.r.l., based in Montecchio Maggiore (VI), Italy, manufactures these valves. Contact details include telephone, fax, email, and website for technical support and ordering. The data provided are indicative and non-binding, subject to change without notice.

Catalog excerpts

Valvole per il controllo della pressione Pressure control valves

Open the catalog to page 1

CBF s.r.l. - Via Caboto, 3 - 36075 Montecchio Maggiore (VI) Tel. 0444 499141 / 0444 499143 - Fax 0444 499145 e-mail: [email protected] - http://www.cbfhydraulic.com VALVOLE PER IL CONTROLLO DELLA PRESSIONE PRESSURE CONTROL VALVES Valvole di massima pressione: sono normalmente chiuse e mantengono una differenza di pressione costante tra l' entrata e lo scarico. Sono generalmente tarabili in un ampio campo di pressione e vengono utilizzate per limitare la pressione in un circuito o abbattere i picchi di pressione che potrebbero danneggiare i componenti del sistema: per esempio pompe, motori,...

Open the catalog to page 2

CBF s.r.l. - Via Caboto, 3 - 36075 Montecchio Maggiore (VI) Tel. 0444 499141 / 0444 499143 - Fax 0444 499145 e-mail: [email protected] - http://www.cbfhydraulic.com hydraulic INDICE PER TIPO Dl VALVOLA INDEXBY VALVE TYPE

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Open the catalog to page 4

CBF s.r.l. - Via Caboto, 3 - 36075 Montecchio Maggiore (VI) Tel. 0444 499141 / 0444 499143 - Fax 0444 499145 e-mail: [email protected] - http://www.cbfhydraulic.com hydraulic* INDICE PER TIPO Dl VALVOLA INDEXBY VALVE TYPE Valvola di sequenza 3 vie normalmente chiusa a cartuccia 3 ways, normally closed sequence valve - cartridge type 138 Valvola di sequenza a3viea cartuccia 3 Ways sequence valve - cartridge type 139 Valvola di sequenza a 4 vie a cartuccia 4 Ways sequence valve - cartridge type 140 Valvola di sequenza pilotata a cartuccia Pilot operated sequence valve - cartridge type 141 Valvola...

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hydraulic Valvola limitatrice di pressione Direct acting relief valve

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CBF s.r.l. - Via Caboto, 3 - 36075 Montecchio Maggiore (VI) Tel. 0444 499141 / 0444 499143 - Fax 0444 499145 e-mail: [email protected] - http://www.cbfhydraulic.com hydraulic* INDICE PER TIPO Dl VALVOLA INDEXBY VALVE TYPE Valvola limitatrice di pressione doppia e anticavitazione Dual relief and anticavitation valve Valvola limitatrice di pressione semplice e anticavitazione Single reliefand anticavitation valve

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Open the catalog to page 8

Open the catalog to page 9

CBF s.r.l. - Via Caboto, 3 - 36075 Montecchio Maggiore (VI) Tel. 0444 499141 / 0444 499143 - Fax 0444 499145 e-mail: [email protected] - http://www.cbfhydraulic.com hydraulic* Valvola limitatrice di pressione diretta a cartuccia Direct acting relief valve - cartridge type Portata massima Vite esterna esagono incassato Leakproof hexsocket screw Sigla di ordinazione / Ordering code

Open the catalog to page 10

Open the catalog to page 11

CBF s.r.l. - Via Caboto, 3 - 36075 Montecchio Maggiore (VI) Tel. 0444 499141 / 0444 499143 - Fax 0444 499145 e-mail: [email protected] - http://www.cbfhydraulic.com hydraulic Valvola limitatrice di pressione diretta a cartuccia Direct acting relief valve - cartridge type Portata massima Dati e tarature ottenuti usando olio con viscosita 30 cSt a 50°C Performaces and calibrations are carried out by using hydraulic oil with 30 cStviscosity at 50°C Vite esterna esagono incassato Leak-proof hex socket screw Volantino e dado Handknob and locknut Sigla di ordinazione / Ordering code

Open the catalog to page 12

hydraulic* CBF s.r.l. - Via Caboto, 3 - 36075 Montecchio Maggiore (VI) Tel. 0444 499141 / 0444 499143 - Fax 0444 499145 e-mail: [email protected] - http://www.cbfhydraulic.com hydraulic* Valvola limitatrice di pressione diretta a cartuccia Direct operated pressure relief valve - cartridge type Vite esterna esagono incassato Leak-proof hex socket screw Volantino e dado Handknob and locknut Sigla di ordinazione / Ordering code

Open the catalog to page 13

CBF s.r.l. - Via Caboto, 3 - 36075 Montecchio Maggiore (VI) Tel. 0444 499141 / 0444 499143 - Fax 0444 499145 e-mail: [email protected] - http://www.cbfhydraulic.com hydraulic Valvola limitatrice di pressione diretta a cartuccia Direct acting relief valve - cartridge type Portata massima Dati e tarature ottenuti usando olio con viscosita 30 cSt a 50°C Performaces and calibrations are carried out by using hydraulic oilwith 30 cStviscosity at 50°C Vite esterna esagono incassato Leak-proof hex socket screw Volantino e dado Handknob and locknut Sigla di ordinazione / Ordering code

Open the catalog to page 14

CBF s.r.l. - Via Caboto, 3 - 36075 Montecchio Maggiore (VI) Tel. 0444 499141 / 0444 499143 - Fax 0444 499145 e-mail: [email protected] - http://www.cbfhydraulic.com hydraulic* Valvola limitatrice di pressione diretta a cartuccia Direct acting relief valve - cartridge type Portata massima finn Vite esterna esagono incassato Leak-proofhex socket screw Volantino e dado Handknob and locknut Sigla di ordinazione / Ordering code

Open the catalog to page 15

CBF s.r.l. - Via Caboto, 3 - 36075 Montecchio Maggiore (VI) Tel. 0444 499141 / 0444 499143 - Fax 0444 499145 e-mail: [email protected] - http://www.cbfhydraulic.com hydraulic* Valvola limitatrice di pressione diretta a cartuccia Direct acting relief valve - cartridge type Portata massima * taratura 00 disponilbile solo con regolazione D setting 00 available only with D adjustement rat. Vite esterna esagono incassato Leak-proofhex socket screw Volantino e dado Handknob and locknut Sigla di ordinazione / Ordering code

Open the catalog to page 16

CBF s.r.l. - Via Caboto, 3 - 36075 Montecchio Maggiore (VI) Tel. 0444 499141 / 0444 499143 - Fax 0444 499145 e-mail: [email protected] - http://www.cbfhydraulic.com hydraulic Valvola limitatrice di pressione diretta a cartuccia Direct operated pressure relief valve - cartridge type Portata massima Vite esterna esagono incassato Leak-proof hex socket screw Volantino e dado Handknob and locknut Sigla di ordinazione / Ordering code

Open the catalog to page 17

Pressure control valves

Pressure control valves

Overview

Main Types of Pressure Control Valves

Valve Construction and Features

Technical Specifications and Parameters

Color Coding and Identification

Valve Models and Adjustment Codes

Installation and Best Practices

Summary of Critical Parameters

Manufacturer Information

Catalog excerpts

All CBF S.r.l. catalogs and technical brochures