Name: DT-NP80
Brand: Datian

DT-NP80 flameproof vapor recovery vacuum pump

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.

Ex marking	Ex db IIA T3 Gb
Protection grade	IP55
Max. flow rate	65 L/min
Max. vacuum	0.05 MPa
Supply	36 V DC, 45 W
Controller	VRB80, fixed-speed or pulse mode
Vane material	Special PTFE, self-adjusting and self-lubricating
Body and cover	Aluminium alloy, corrosion-protected
Hazardous area	Zone 1 and Zone 2, IIA / T3

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Specifications

Technical Specifications

Parameter	Value
Ex marking	Ex db IIA T3 Gb
Protection grade	IP55
Ambient temperature	−20 °C to +50 °C
Ambient pressure	80 kPa to 106 kPa
Max. flow rate	65 L/min
Max. vacuum	0.05 MPa
Voltage	36 V DC
Motor power	45 W
Noise	< 60 dB
Weight	5 kg
Gas port thread	BSP F 1/2" female

Service Conditions

Where It Can Be Installed

Altitude not above 1 000 m
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.

Dispenser fitted with the NP vapor recovery pump in the Datian workshop

NP pump mounted inside the dispenser cabinet during Stage II assembly

NP pump vapor-return pipework inside the dispenser, detail

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.

Request a quotation