BL-20-2 Blackstone Chemical Pump
Browse the BlackStone Chemical Dosing Pump range here at Hanna Instruments.
The low-maintenance BlackStone range covers a wide spectrum of dosing capacities and all made with positive displacement solenoid driven pumps that use a minimum number of moving parts, therefore reducing the risk of mechanical failure and ensuring each stroke is identical for a consistent flow rate. (Scroll down for a full list of materials used in the pump’s construction.)
Each pump measures 194 x 165 x 121 mm (7.6 x 6.5 x 4.8 inches), and weighs 3 kg (6.6lb). Installation has been made easy with ready-drilled holes for horizontal or vertical mounting. Easy operation has also been considered with a single control for pump output.*IP65 (International Protection Rating) equals dust tight and water jet protected.
L20-2 BlackStone Chemical Dosing Pump
The BL20-2 BlackStone Chemical Dosing Pump has a flow rate of 18.3 LPH (Litres per hour), rated pressure 0.5 bar (7.4 psi), and dosing frequency strokes per minute of 120. Power supply: 220/2240 VAC.
Simple operation is guaranteed with a single control for pump output. The external flow rate control (potentiometer), on the face of the pump, allows users to adjust the percentage of flow from 0 to 100 per cent thus eliminating concerns over stroke rate or power settings. An LED Indicator lights up each time a stroke begins, allowing the user to keep an eye on the stroke rate from a distance.
Each pump is supplied with discharge and suction valves.
Accessories available:
- HI-721004 Injection Valve assembly
- HI-721005 Foot valve assembly
- HI-721101 Pump head, O-ring, screws and washer
- HI-721102 Discharge valve assembly
- HI-721103 - Suction valve assembly
- HI-721008 - Ceramic weight (4)
- HI-720011D - Magnet and coil for BL Pumps (230VAC)
- HI-720011U - Magnet and coil for BL pumps (115VAC)
- HI-720025 - Pump body
- HI-720034 - Magnet pump head assembly for BL pumps
- HI-721001 - Complete pump head with valves
- HI-72001 - Tube nut, 5 x 8 mm dia. (100 pcs)
- HI-721009 - Diaphragm
- HI-721010 - PTFE coated O-ring for pump head
- HI-721011 - Aluminium piston, insulation disk, washer and springs replacement kit for BL pump
- HI-721013 - Piston set for BL pump
- HI-721014 - Bottom housing and housing seal
- HI-721104 - Small diaphragm for BL pumps
- HI-721105 - BlackStone spare pump head
- HI-721106 - BlackStone pump head assembly
- Pump head in PVDF (Polyvinylidene Fluoride)
- Diaphragm - a one-piece construction made from the very resistant PTFE (Polytetrafluoroethylene).
- Ball valves – glass
- O-rings – FPM/FKM (Fluoro Rubber)
- 5 x 8mm polyethylene tubing
Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.