Flameproof NP-80 vapor recovery vacuum pump, 36 V DC, with its own variable-frequency controller.
NP-80 Vapor Recovery Vacuum Pump
The pump body is bolted straight onto the motor housing and the rotor runs on the motor shaft, so the whole unit is one integrated motor-driven block. As the rotor turns, the vanes slide in their slots and gas is drawn in at the inlet port and pushed out at the outlet port. Speed is adjustable across the range, which is what lets the controller track the dispenser.
Ambient air temperature from −20 °C up to +50 °C, following the season
Maximum monthly average relative humidity 90 %, with that month’s average minimum temperature not above 25 °C
Hazardous areas Zone 1 and Zone 2 with IIA, T3 gas or vapor mixtures
Installation follows GB/T 3836.15-2017, inspection and maintenance GB/T 3836.16-2017, and repair and overhaul GB 3836.13-2013. Final values are confirmed per order — contact our engineering team for the drawing, the certificate set and the spare-parts list.
Comparison
NP-80 Versus a Piston-Type Pump
Both designs reach the same vacuum, but they get there differently — and only one of them can follow the nozzle.
Item
DT-NP80
Piston-type pump
Mechanism
Ball-bearing
Piston-type
Pump to nozzle
One pump – one nozzle (normally)
One pump – two nozzles
Motor power
Variable frequency
Fixed frequency
Speed control
Frequency modulation from the flowmeter sensor signal
No flowmeter sensor connection needed
Vapor / fuel ratio
Can hold a set ratio, e.g. 1.10
Cannot
Additional components
Automatic frequency-conversion control box
—
Flow characteristic
Adjustable flow rate
Constant flow
Vacuum standard
−0.04 MPa
−0.04 MPa
Datian ex-factory vacuum
−0.05 MPa
−0.05 MPa
Maintenance
Replace the pump head
Replace the pump head
Warranty
1–2 years
1–2 years
Monitoring system
Yes
No
Scope of Supply
What Ships in the Box
Item
Type
Qty
Flameproof vapor recovery vacuum pump
NP-80
1
Vapor recovery vacuum pump controller
VRB80
1
Instruction manual
NP-80
1
Certificate of conformity
NP-80
1
The pump needs no oil lubrication. The flame arrester should be kept clean.
Workshop Photos
Original Photos: the NP Pump on Real Dispensers
Straight from the Datian workshop: a dispenser assembled around the NP pump, the pump set inside the cabinet, and the vapor-return pipework in detail. Click any photo to view it full size.
Need the DT-NP80?
Tell us how many nozzles you are covering and whether you run fixed speed or pulse mode — we will confirm the pump and controller set and quote within 24 hours.
