
Hydraulic Metering Pumps
OBL Blackline XR Hydraulic Diaphragm Metering Pump
OBL Blackline XR hydraulic diaphragm pumps: ~0.6–105 L/h, up to ~40 barg; built-in relief valve; compact ~180×250 mm footprint.
Max flow
0.6 – 105 L/h
Max pressure
to 40 barg / 580 psi
Turndown / accuracy
—
Wetted materials
AISI-316L / PVC / PVDF; PTFE diaphragm
Protection
—
Power
—
Features
- Hydraulic diaphragm with built-in PSV
- 0.6–105 L/h, up to 40 bar
- Compact ~15 kg footprint
- SS316L / PVC / PVDF liquid ends
- Manual stroke; optional actuator
- Optional Blackline PRO remote electronic control
Specifications
| Flow range | 0.6 – 105 L/h |
| Max pressure | to 40 barg / 580 psi |
| Drive | hydraulic diaphragm (inside) |
| Footprint | approx. 180×250 mm; approx. 15 kg |
| Wetted materials | AISI-316L / PVC / PVDF; PTFE diaphragm |
| Brand | OBL Blackline(Alfa Valvole) |
Applications
Materials & media
| Wetted materials | AISI-316L / PVC / PVDF; PTFE diaphragm |
Common chemicals: NaOCl, acids, alkalis, polymers — confirm compatibility when inquiring.
Controls & communication
Control options are listed in notes or confirmed on inquiry.
Models & specs
| Model | Flow | Pressure | |
| XR 2.15 | 2 L/h | 20 bar | |
| XR 2.30 | 11 L/h | 20 bar | |
| XR 6.20 | 13 L/h | 40 bar | |
| XR 6.30 | 30 L/h | 20 bar | |
| XR 6.38 | 65 L/h | 15 bar | |
| XR 6.48 | 105 L/h | 10 bar |
Dimensions & installation
Dimensional drawings available on request (CAD / PDF).
Downloads
Related / accessories

Pump
Milton Roy MAXROY Series Industrial Hydraulic Diaphragm Metering Pump

Pump
Nanfang GH Hydraulic Diaphragm Metering Pump

Pump
Milton Roy mRoy A & B Series Hydraulic Diaphragm Metering Pump

Pump
Doseuro Type SD Sandwich Hydraulic Diaphragm Metering Pump

Pump
CNP FROY Hydraulic Diaphragm Metering Pump

Pump
Doseuro Type B&BR Hydraulic Diaphragm Metering Pump
Related solutions
Power Plant Boiler Water
Ammonia, hydrazine and phosphate dosing with sampling monitoring to prevent corrosion and scaling.
Industrial Cooling Water
Scale & corrosion inhibitor dosing for power and metallurgy cooling systems with online pH/conductivity monitoring.
Steel Rolling Direct Circulating Water
Flocculant dosing and pH control for direct circulating water to improve quality and cut fresh-water use.
Related case studies

Boiler
Boiler House Automation Retrofit
Ammonia/hydrazine auto-dosing replaced manual work; boiler pH stays compliant.

Chemical
Chemical Park Acid/Alkali Neutralization
Corrosion-resistant mechanical diaphragm pumps dosing concentrated acid/alkali with closed-loop pH control — 99% compliance.

Agriculture
Greenhouse Fertigation
EC/pH dual-control fertigation saved 40% water and 30% fertilizer.
Need help selecting?
Share duty (flow, pressure, media, controls) — we reply within 1 business day.