Hydropneumatic Tank Philippines: Bladder Pressure Tanks for Commercial Buildings

A hydropneumatic tank is a pressure vessel that holds water on one side of a flexible bladder and compressed air on the other. As the booster pump fills the tank, the air charge compresses and stores energy; when a tap or process line opens, that compressed air pushes water back into the riser without the pump having to start. JOHOB Hardware Trading is a hydropneumatic tank supplier in the Philippines, quoting the vessel together with the pump set and panel it serves.

In practice the tank does three jobs. First, it supplies small draws so the pump is not switching on for a single lavatory faucet, the main cause of premature motor and contactor failure in mid-rise buildings. Second, it absorbs pressure surge when a pump starts or a solenoid valve slams shut, protecting fittings and flexible connectors. Third, it holds system pressure steady between the cut-in and cut-out setpoints so occupants on upper floors do not feel the swing. Note the distinction buyers often blur: a hydropneumatic tank is not a storage tank. Storage volume is handled separately by a cistern or a modular tank from TankSmith modular water tanks. The hydropneumatic tank stores pressure, and its useful volume, called drawdown, is only a fraction of its nameplate capacity. Sizing it as if it were storage is the most common specification error we see on RFQs.

We supply hydropneumatic bladder tanks in capacities from 100 litres to 5,000 litres, with PN10 and PN16 pressure ratings (10 to 16 bar) depending on the model selected, food-grade EPDM bladders that fully isolate the stored water from the steel shell, and both vertical and horizontal orientations. Full engineering detail is on the hydropneumatic bladder pressure tank specifications page. Pre-charge is factory-set and must be re-checked on site against your cut-in setpoint, so specify design pressures at RFQ stage. On a typical commercial specification we quote the tank as part of a package: vertical multistage pumps, a VFD duplex control panel, the bladder tank, and the flexible connectors and isolation valves between them, as one of our complete booster pump system packages. A package quote lets us confirm the pre-charge, the acceptance volume, and the panel setpoints agree with each other before anything ships.

Sizing starts with drawdown, not nameplate volume. Drawdown is the water the tank actually delivers between the pump cut-out and cut-in pressures, and it is always smaller than tank capacity. The working relationship: acceptance factor equals (absolute cut-out pressure minus absolute cut-in pressure) divided by absolute cut-out pressure, and required tank volume equals your target drawdown divided by that acceptance factor. Work in absolute pressure, meaning gauge pressure plus roughly 1.0 bar of atmosphere. A worked example: if your system cuts in at 3.0 bar gauge (4.0 bar absolute) and cuts out at 4.5 bar gauge (5.5 bar absolute), the acceptance factor is (5.5 minus 4.0) divided by 5.5, or 0.27. If you want 30 litres of drawdown, you need roughly 110 litres of tank. Widening the pressure band gives more drawdown from the same vessel but a less comfortable experience at the fixtures. Your target drawdown comes from the maximum permitted pump starts per hour on the pump manufacturer's data sheet. On a VFD-controlled duplex set the tank can be smaller than on a fixed-speed set, because the drive already smooths demand, but it is not optional, as our guide on VFD versus fixed-speed pumps explains. Always cross-check the result against fixture unit demand computed per our guide on how to size a booster pump for a commercial building rather than sizing from pump horsepower alone.

We source from both Philippine and Chinese partner factories and deliver with local warranty and after-sales support, the practical difference between buying a tank and buying a system someone answers for in year two. We do not build the vessels ourselves, and we will not tell you otherwise. On certification, the bladder tanks carry CE marking and are manufactured in accordance with the PED 2014/68/EU pressure equipment directive, with ASME-rated construction available where the project specification calls for it; source factories operate ISO 9001 quality management systems and equipment is TUV SUD tested. Every shipment includes material test certificates for the shell and factory inspection reports confirming pressure testing before dispatch. WRAS-certified panels apply to our modular water storage tanks under TankSmith rather than to bladder vessels, so if your consultant requires potable-contact documentation on the bladder itself, raise it at RFQ stage; regulatory context is collected in our Philippine water tank compliance guide. On the pump side we work with Grundfos, DAB, and Speroni, alongside CDL engineered vertical multistage pumps, and Chutian control panels built around Inovance variable frequency drives, so we can quote the same duty at two or three price points instead of pushing one line.

Pricing is quote-based, because the number that matters depends on capacity, pressure rating, orientation, connection sizing, and whether the tank is quoted standalone or as part of a pump and panel package. Send your design pressures and demand figures and you will get a response within one business day. On tax treatment, 12 percent VAT applies to VAT-registered buyers, while locators inside PEZA and SBMA and registered exporters are quoted at zero-VAT, with the paperwork covered on our page for SBMA and PEZA locator supply terms. Lead times run 21 to 35 days for ex-stock items and 45 to 90 days for made-to-order configurations; larger capacities and non-standard pressure ratings sit at the made-to-order end, so if your turnover date is fixed, start the enquiry before the pump room is poured rather than after. Delivery is nationwide: NCR, the rest of Luzon, Visayas, and Mindanao, including the PEZA, SBMA, and Clark economic zones. Provide the delivery address, the access route into the pump room, and the available lifting method with your enquiry, because a 5,000 litre vessel that fits the room but not the doorway is a scheduling problem nobody wants on handover week.

The buyers who specify these vessels are consultants, project engineers, facilities managers, and procurement teams, and the duty differs sharply by building type. Hotel and hospitality water systems run heavy morning and evening demand peaks with long quiet periods in between, which is exactly the profile that punishes an undersized tank with constant pump cycling. Hospital and healthcare facility water systems cannot tolerate pressure dips on sterilisation and equipment feeds, and typically require duplex redundancy with the tank holding the line during changeover. Commercial laundries draw large intermittent volumes at fixed pressure, and the tank plus VFD combination is what keeps the washers from starving each other. Locators inside SBMA, PEZA, and Clark bring the zero-VAT treatment plus an uptime requirement that pushes specification toward redundancy. Our published commercial laundry booster system in Taguig documents a duplex CDL booster system with VFD controls and a hydropneumatic bladder tank specified together. As a hydropneumatic tank supplier we would rather size against your fixture schedule or process demand figures than quote a vessel in isolation, so send those with the required residual pressure and the pump room dimensions.

Frequently Asked Questions

Related Pages

• Hydropneumatic Bladder Pressure Tank Specifications
• VFD Duplex Control Panel
• Varem Bladder Tank Philippines
• 200L Diaphragm Pressure Tank Supplier
• Guide: How to Size a Booster Pump

Reviewed: August 2026