The explosion-proof relief valve DBE series is an electrically controlled pressure regulating valve designed for flammable and explosive environments, with precise proportional pressure regulation and safe explosion-proof characteristics. Proportional relief valve DBE has a built-in mechanical emergency relief function, automatically switch to safe pressure when power is off. And wear-resistant coating on valve core can extend service life.
| Fluid | Mineral oil suitable for NBR and FKM seal |
| Phosphate ester for FKM seal | |
| Fluid temperature range ℃ | -30 to +80 (NBR seal) |
| -20 to +80 (FKM seal) | |
| Viscosity range mm2/s | 2.8 to 380 |
| Linearity | ±3.5% |
| Repeatability | ＜±2% |
| Electrica | |
| Power source | DC |
| Min.solenoid current mA | 100 |
| Max.solenoid current mA | 800 |
| Coil resistance | 19.5Ω at 20℃, Max.warm value:28.8Ω |
| Working status | Continuous |
| Max.working environmental temperature | +50℃ |
| Insulation to DIN 40 050 | IP65 |
Features:
-Sub-plate mounting:
- Porting pattern to DIN 24 340 form E and ISO 6264
- For installation in manifolds
- 4 pressure ratings
- Max. pressure limitation , optional
- Amplifier type VT-2000 (must be ordered separately)
Application:
Explosion-proof pressure relief valve DBE can be used for drilling platform blowout preventers (BOP), down hole tools, natural gas compression stations, mining hydraulic supports, shield machines, gas extraction equipment, deep-sea drilling equipment, and explosion-proof deck machinery.
Example:
Explosion-proof PLC → Explosion-proof proportional amplifier → DBE valve → Hydraulic actuator
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Explosion-proof pressure sensor (feedback)
Explosion-proof pressure relief valve DBE is pilot operated pressure relief valve. It is used to continuously set the pressure in hydraulic systems by electrical signal.
Basically these valves consist of a pilot valve (1) with proportional solenoid (2) and the main valve (3) with main spool insert (4).
Type HD-DBE...FB
The pressure limit is in relation to the electrical current value and set by the proportional solenoid (2). The system pressure is applied to the main spool(4). At the same time the pressure is applied to the spring loaded side of the main spool (4) and the pilot poppet (6) via orifice (5) at the pilot valve (1). If the hydraulic force exceeds the solenoid force, the pilot poppet (6) opens. Pilot fluid can flow back to tank and pressure drop caused by the orifices effects the main spool (4). Then main spool (4) opens the channel from pump to tank.
Symbol of Explosion-proof Pressure Relief Valve DBE
Address
No. 27, Yangsha Road, Huilong Town, Qidong City, Jiangsu Province, China
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