How do I select a dosing pump for chlorine and antiscalant dosing in a Saudi Arabia RO desalination plant?

For chlorine (sodium hypochlorite) dosing ahead of RO membranes, a solenoid-driven or motor-driven diaphragm pump with PVDF or PVC wetted parts is standard — PVDF provides superior chemical resistance to NaOCl and avoids chlorine off-gassing. Flow rate selection is based on system flow (typically 0.5–2 mg/L dosing rate), so a pump in the 1–50 L/h range is common for small to mid-size RO plants in Saudi Arabia. For antiscalant injection at high-pressure RO (55–80 bar in SWRO), a ceramic-plunger high-pressure dosing pump rated to at least 100 bar is recommended — inject downstream of the high-pressure pump on the feed side of the membrane array. For antiscalant at low-pressure BWRO, a standard diaphragm pump with back-pressure valve and injection quill is sufficient. Gulf Union Ozone stocks both solenoid diaphragm pumps (0.1–50 L/h) and high-pressure ceramic plunger pumps (up to 300 bar) from our Jeddah warehouse for Saudi Arabia RO desalination applications.

What is the difference between a diaphragm and peristaltic dosing pump for acid and caustic dosing in KSA water treatment?

Diaphragm dosing pumps (solenoid or motor-driven) use a reciprocating PTFE or PVDF diaphragm to displace chemical — they are accurate (typically ±1–3%), handle pressures up to 16 bar, and are well-suited for clean corrosive chemicals such as hydrochloric acid (HCl), sulphuric acid, caustic soda (NaOH), and sodium hypochlorite in Saudi Arabia water treatment. They require suction and discharge check valves, and can lose prime if there is vapour locking with outgassing chemicals like hypochlorite. Peristaltic (hose) pumps work by mechanically compressing a flexible hose — there are no seals, valves, or diaphragm in contact with the chemical, making them ideal for abrasive slurries, viscous polymers, and chemicals prone to crystallisation or degassing. They self-prime easily and can run dry without damage. For concentrated caustic or hydrochloric acid, diaphragm pumps with PVDF heads are preferred for accuracy. For polymer (polyelectrolyte) dosing or calcium hypochlorite slurries, peristaltic pumps are the better choice due to their tolerance of viscous and abrasive fluids. Gulf Union Ozone stocks both types with full chemical resistance guidance for KSA water treatment applications.

What is included in a dosing skid package for cooling tower water treatment in Saudi Arabia industrial facilities?

A standard chemical dosing skid for cooling tower water treatment in Saudi Arabia industrial plants typically includes: a polyethylene (PE) or SS 316 chemical storage tank (100L–1000L depending on dosing rate and refill frequency), a metering pump (solenoid or motor-driven diaphragm, sized to system flow and target dosing concentration), a suction foot valve with strainer (to maintain pump prime), a pulsation dampener (to smooth flow pulsations, especially important for scale inhibitor and biocide dosing at high frequency), a back-pressure valve (to maintain a minimum counter-pressure at the pump discharge and prevent siphoning), a stainless steel injection quill (for injection into the cooling tower basin return or makeup water line), a tank level switch (low-level alarm to prevent pump dry-running), and pressure gauges on the discharge line. For automated plants, a 4–20 mA or HART-compatible control module is added for flow-pacing from the cooling tower makeup water flowmeter or conductivity controller. ATEX-rated dosing skids (Zone 2 rated motors and solenoids) are available for hazardous-area cooling tower installations at petrochemical and SABIC sites in Saudi Arabia. Gulf Union Ozone supplies complete packaged dosing systems from our Jeddah warehouse with full IOM documentation.

Dosing & Metering Pumps Saudi Arabia

Dosing & Metering Pump Categories

Product Types in Stock

Gulf Union Ozone carries six core categories of dosing and metering pumps covering the full range of chemical injection requirements for Saudi Arabia water treatment, RO desalination, cooling tower, and industrial process plants. All items supplied with CE documentation, datasheet, and material certificates.

Type 01

Solenoid-Driven Diaphragm Dosing Pumps

Electromagnetic (solenoid) actuated diaphragm dosing pumps with PTFE and PVDF wetted parts; flow rate 0.1–50 L/h; max operating pressure 10–16 bar; manual stroke length and frequency adjustment via front-panel controls; optional 4–20 mA external signal control for SCADA integration. Ideal for chemical dosing of sodium hypochlorite (chlorine), hydrochloric acid, scale inhibitors, antiscalants, and biocides in Saudi Arabia municipal water treatment plants, desalination pre-treatment, and cooling tower circuits. Compact footprint for mounting on dosing skids or pipe racks.

Type 02

Mechanical Diaphragm Dosing Pumps

Motor-driven (4-pole IEC motor) mechanical dosing pumps with micrometer stroke length adjustment; double diaphragm (hydraulically actuated) for enhanced safety on hazardous chemicals; flow rate 1–1000 L/h; max pressure 16 bar; PVDF or SS 316L pump heads for broad chemical compatibility. Suited to demanding Saudi Arabia chemical dosing applications including chlorination, coagulant dosing (alum, PAC, ferric sulphate), antiscalant injection, and acid/caustic dosing in SWRO and BWRO desalination plants. Mechanically robust for continuous 24/7 operation in process plant environments.

Type 03

Peristaltic (Hose) Metering Pumps

Peristaltic pump with replaceable hose element available in natural rubber, NBR, silicone, EPDM, and Viton to match chemical compatibility; self-priming; can run dry without damage; no internal seals or check valves — chemical contacts only the hose bore. Flow range 0.1–20,000 L/h across model range. For abrasive slurries, viscous chemicals, shear-sensitive polymers, and outgassing acids where diaphragm pumps are unsuitable. Widely used in Saudi Arabia water and wastewater treatment for polymer dosing, calcium hypochlorite slurry transfer, and sodium hypochlorite metering in outgassing environments.

Type 04

Piston & Plunger Dosing Pumps

Ceramic-plunger high-pressure dosing pumps rated to 300 bar for antiscalant and scale inhibitor injection at high-pressure RO membranes (SWRO 55–80 bar); packed-plunger variants for high-viscosity fluids including heavy inhibitor blends and viscous biocides; diaphragm-sealed piston pumps for clean chemical service where zero leakage is required. Single and triplex-head configurations available for pulsation reduction. Essential for Saudi Arabia SWRO and BWRO desalination plants where antiscalant must be injected on the high-pressure feed side of the membrane array. Flow range 0.5–100 L/h at rated pressures.

Type 05

Dosing Systems & Chemical Skids

Complete packaged chemical dosing systems assembled on a structural steel or SS 316L frame: PE or SS tank (100–1000L), metering pump (diaphragm or peristaltic), suction foot valve, injection quill (SS 316 or HDPE), discharge pressure gauge, pulsation dampener, back-pressure valve, and tank level switch (low-level alarm). For turnkey chemical dosing of sodium hypochlorite, alum, polymer, antiscalant, acid, and caustic in Saudi Arabia water treatment and industrial plants. ATEX-rated skids (Zone 2 rated motors and solenoids) available for hazardous area dosing at SABIC, Saudi Aramco, and petrochemical complex sites.

Type 06

Pump Accessories & Calibration Equipment

Full range of dosing pump accessories: calibration cylinders (graduated columns 500ml–2000ml for in-situ flow verification); pulsation dampeners in PVC, PP, and SS 316 for 1/4"–2" connections; back-pressure valves in PVDF for maintaining minimum counter-pressure; stainless steel injection quills (DN15–DN50) for in-line chemical injection; PVDF and PP foot valves with strainer for tank suction; diaphragm spare kits and packing sets; 4–20 mA and HART control modules for automated flow pacing from water meters or DCS/BMS; RS485/Modbus RTU interfaces for SCADA integration in Saudi Arabia industrial plants.

Product Catalog

Complete Dosing & Metering Pump Range — 28+ Products

All dosing pumps and chemical dosing systems supplied with CE declarations of conformity, material certificates, and IOM documentation. ISO 9001:2015 QMS (CR 4030570569). Representative stock lines — contact us for specific flow rates, materials, and project quantities.

Pump Type	Flow Range	Max Pressure	Wetted Materials	Control	Application
Solenoid Diaphragm Dosing Pump — SD Series (Low Flow)	0.1–12 L/h	10 bar	PTFE diaphragm, PVC pump head	Manual stroke frequency	Chlorine dosing, small water treatment systems, cooling tower biocide
Solenoid Diaphragm Dosing Pump — SD Series (Standard)	1–50 L/h	16 bar	PVDF pump head, PTFE diaphragm	Manual + 4–20 mA	NaOCl, antiscalant, acid dosing — Saudi Arabia RO & municipal water plants
Solenoid Diaphragm Dosing Pump — PVDF Head, HART	0.2–30 L/h	16 bar	PVDF head, PTFE/EPDM diaphragm	HART + 4–20 mA + pulse	SCADA-integrated chemical dosing in Saudi Arabia industrial plants
Motor-Driven Diaphragm Dosing Pump — MD Series (Low)	1–200 L/h	16 bar	PVDF pump head, SS 316 valve balls	Micrometer stroke adjust + 4–20 mA	Chlorination, coagulant dosing, antiscalant — KSA water treatment
Motor-Driven Diaphragm Dosing Pump — MD Series (High)	10–1000 L/h	16 bar	SS 316L pump head, PTFE diaphragm	Variable speed drive (VFD) compatible	Large-capacity chemical dosing in Saudi Arabia municipal and industrial water plants
Hydraulic Diaphragm Dosing Pump — HD Series	5–500 L/h	16 bar	PTFE diaphragm, SS 316 or Hastelloy wetted	Stroke length + speed adjust	High-accuracy chemical metering, acid & caustic dosing in KSA process plants
Double-Diaphragm Hydraulic Dosing Pump	1–300 L/h	16 bar	PVDF / PTFE double diaphragm, SS 316 valves	Diaphragm rupture detection alarm	Hazardous chemical dosing with secondary containment — SABIC, Aramco plants
Peristaltic Metering Pump — Small Series	0.1–30 L/h	2 bar	EPDM or Viton hose	Manual speed control	Lab-scale dosing, polymer, NaOCl slurry, outgassing chemical transfer
Peristaltic Metering Pump — Medium Series	5–500 L/h	3 bar	NBR or natural rubber hose	4–20 mA speed control + VFD	Polymer dosing, abrasive slurry, wastewater treatment — Saudi Arabia plants
Peristaltic Metering Pump — High-Flow Industrial	100–20,000 L/h	2.5 bar	NR / NBR / Viton hose up to DN150	VFD with Modbus RTU	Large-volume slurry transfer, sludge handling, industrial process — KSA
Ceramic Plunger High-Pressure Dosing Pump	0.5–50 L/h	300 bar	Ceramic plunger, SS 316L cylinder and valves	Stroke adjust + 4–20 mA	Antiscalant injection at SWRO high-pressure membranes — Saudi Arabia desalination
Packed Plunger Pump — High-Viscosity	1–100 L/h	100 bar	SS 316 plunger, PTFE packing	Variable speed motor drive	Viscous inhibitor blends, heavy biocides, concentrated chemical transfer
Triplex Head Plunger Metering Pump	5–200 L/h	200 bar	SS 316L / Duplex SS wetted parts	VFD + PLC interface	Low-pulsation high-pressure chemical injection — refinery, RO plant KSA
Chemical Dosing Skid — Single Pump, PE Tank 100L	Per pump selection	Per pump rating	PE tank, SS frame, PVDF fittings	Manual with level switch	Single-chemical dosing station — NaOCl, antiscalant, acid for small KSA plants
Chemical Dosing Skid — Duplex Pumps, SS Tank 200L	Per pump selection	Per pump rating	SS 316L tank & frame, PVDF valves	Lead/standby auto-changeover + level alarm	Continuous chemical dosing with standby pump — industrial water treatment KSA
Chemical Dosing Skid — Triplex Station 500L PE Tank	Per pump selection	Per pump rating	PE tank, SS 316L frame, PVDF piping	PLC panel with SCADA output	Multi-chemical dosing (coagulant + antiscalant + NaOCl) — large Saudi Arabia plants
ATEX Chemical Dosing Unit — Zone 2 Rated	Per pump selection	Per pump rating	SS 316L tank & frame, ATEX motor & solenoid	ATEX Ex II 2G (Zone 2) classified	Hazardous area chemical dosing — SABIC, Aramco, petrochemical KSA sites
Antiscalant Dosing System — RO Plant Package	0.5–50 L/h	Up to 100 bar discharge	SS 316L pump head, HDPE injection quill	Flow-paced via 4–20 mA	Antiscalant dosing on SWRO and BWRO feed — Saudi Arabia desalination plants
Chlorination Dosing System — NaOCl 200L Package	0.1–20 L/h	10 bar	PE tank, PVDF pump head, PVDF fittings	Manual + 4–20 mA residual signal	Disinfection chlorination — municipal water supply and distribution in Saudi Arabia
Coagulant / PAC Dosing System — Alum & Ferric	1–200 L/h	6 bar	PVDF pump head, SS 316 injection quill, PE tank	Flow-paced, manual set point	Coagulant dosing in clarifiers, DAF units — Saudi Arabia water & wastewater plants
Calibration Cylinder — 1000 ml Graduated Column	N/A — volumetric measurement	N/A	Clear PVC or borosilicate glass	Manual reading	In-situ pump flow rate verification — required for ISO & GMP site calibration
Pulsation Dampener — PVC, 1/2"–2"	N/A — pipeline accessory	10 bar	PVC body, EPDM bladder	Passive — pre-charged nitrogen bladder	Smoothing dosing pump pulsations — protects meters and injection quills downstream
Pulsation Dampener — SS 316, 1/2"–2"	N/A — pipeline accessory	16 bar	SS 316L body, PTFE bladder	Passive — pre-charged nitrogen bladder	High-pressure chemical service — acid, NaOCl dosing in industrial KSA plants
Back-Pressure Valve — PVDF, 1/4"–1"	N/A — pipeline accessory	16 bar	PVDF body, PTFE or EPDM seat	Spring-loaded, field-adjustable 0.5–10 bar	Preventing siphoning and maintaining minimum counter-pressure on dosing pump discharge
Injection Quill — SS 316, DN15–DN50	N/A — pipeline accessory	16 bar	SS 316L quill, PVDF check tip	Passive — threaded saddle connection	Chemical injection point into main process pipework — water treatment, RO plants KSA
Foot Valve with Strainer — PVDF / PP	N/A — suction accessory	6 bar	PVDF or PP body, SS 316 strainer mesh	Spring-loaded non-return check	Tank suction prime retention for dosing pump — prevents back-flow into chemical tank
4–20 mA / HART Control Module	N/A — control accessory	N/A	DIN-rail mount, IP65 enclosure	4–20 mA, HART, pulse, RS485 Modbus	Automated dosing flow-pacing from flowmeter or DCS — Saudi Arabia plant SCADA integration

Dosing & Metering Pumps Supplier Saudi Arabia — Diaphragm Dosing Pumps, Peristaltic Pumps & Dosing Skids In Stock

Product Types in Stock

Solenoid-Driven Diaphragm Dosing Pumps

Mechanical Diaphragm Dosing Pumps

Peristaltic (Hose) Metering Pumps

Piston & Plunger Dosing Pumps

Dosing Systems & Chemical Skids

Pump Accessories & Calibration Equipment

Complete Dosing & Metering Pump Range — 28+ Products

Why Process Engineers in Saudi Arabia Choose Gulf Union Ozone for Dosing Pumps

Local Stock — Same-Day Dispatch

Full IOM & CE Documentation Ready

ISO 9001:2015 Certified Quality

Nationwide KSA Delivery

Also Stocked at Gulf Union Ozone

Water Treatment Equipment

Industrial Filters

Storage Tanks & Vessels

Flow Meters & Level Instruments

Request a Dosing & Metering Pump Quotation