WRAS approved bladder expansion vessel for mains water supply systems

Approval according to EC Pressure Equipment Directive 2014/68/EU.

-replaceable bladder according to DIN EN 13831
-all vessel parts in contact with water are coated against corrosion
-durable external powder coating finish
-vessels stand vertical with profile steel construction on feet
-vessels from diam.1000ltr with pressure gauge integrated in the gas compartment

Type: DE 200
Nominal volume: 200 l
Useful volume max: 150 l
perm. This product is manufactured by Reflex. op. temperature: 70 °C
perm. op. overpressure: 10 Bar.
Gas in press. ex works: 4 Bar.
Diameter: 634 mm
Height: 967 mm
Net weight: 36,5 kg
System connection: G 1 1/4

The Reflex DE Pressure Vessel - 200Ltr is a Pressure Vessel item.

The operating pressure of this is 10 bar.

Reflex N, diaphragm expansion vessel for closed heating and cooling systems, built acc. This product is manufactured by Reflex. to EN 13831.
Approval acc. to EU Pressure Equipment Directive 2014/68/EU

-foot construction from N 35
-durable external powder coated finish
-non-replaceable diaphragm

Type: N 200
Nominal volume: 200 l
Useful volume max: 180 l
perm. flow temp. supp. Ins: 120 °C
perm. op. temp. diaphragm: 70 °C
perm. op. overpressure: 6 Bar.
Gas inlet press. Ex works: 1,5 Bar.
Diameter: 634 mm
Height: 758 mm
Net weight: 23,08 kg
System connection: R 1

The Reflex N Closed Heating & Cooling System Pressure Vessel - 200Ltr is a Pressure Vessel item.

The operating pressure of this is 6 bar.

ULTRA-PRO is appropriate for any modern installation and can be applied to any type of irrigation pump, centrifugal pump and booster sets.

The food grade membrane is replaceable. This product is manufactured by Zilmet. The membrane pressure tank's real volume is superior than that of a normal tank, therefore, it has a smaller footprint at equal water yield, minimum pump starts and is energy saving. The wide range available, the vertical and horizontal version, the galvanised and Stainless Steel connection flange makes Zilmet pressure tanks suitable for any application. The tank is factory tested and certified according to EU directive 97/23/EC. Maximum duration of the membrane is assured as the membrane itself cannot bend or rub against the plate as it is fixed above to the connection and below to the flange.

The tank's lifetime is practically unlimited as the membrane can be replaced.

The Zilmet Ultra-Pro Horizontal Expansion Vessel - 10 bar. - 200Ltr is a Pressure Vessel item.

The operating pressure of this is 10 bar.

ULTRA-PRO is appropriate for any modern installation and can be applied to any type of irrigation pump, centrifugal pump and booster sets.

The food grade membrane is replaceable. This product is manufactured by Zilmet. The membrane pressure tank's real volume is superior than that of a normal tank, therefore, it has a smaller footprint at equal water yield, minimum pump starts and is energy saving. The wide range available, the vertical and horizontal version, the galvanised and Stainless Steel connection flange makes Zilmet pressure tanks suitable for any application. The tank is factory tested and certified according to EU directive 97/23/EC. Maximum duration of the membrane is assured as the membrane itself cannot bend or rub against the plate as it is fixed above to the connection and below to the flange.

The tank's lifetime is practically unlimited as the membrane can be replaced.

The Zilmet Ultra-Pro Vertical Expansion Vessel - 16 bar. - 200Ltr is a Pressure Vessel item.

The operating pressure of this is 16 bar.

The Zilmet Hydro-Pro Vertical Expansion Vessel - 10 bar. - 200Ltr is a Pressure Vessel item.

The operating pressure of this is 10 bar.

The Zilmet Cal-Pro Vertical Expansion Vessel - 6 bar. - 200Ltr is a Pressure Vessel item.

The operating pressure of this is 6 bar.

Built for sealed heating (EN 12828) and chilled-water systems, Flexcon Premium Expansion Vessels stabilise system pressure by absorbing thermal expansion so plant runs safely and efficiently.

A new TPO (thermoplastic polyolefin) diaphragm on 1235 Ltrs models delivers high flexibility and extremely low permeability, helping the pre-charge hold for longer. Lighter construction cuts material use and transport emissions; packaging is FSC-certified to reduce CO₂ impact.

• Sustainable design lighter TPO membrane uses up to 50% less material
• Long service life 15-year warranty
• Low permeability pre-charge pressure maintained for longer
• Heating & cooling suitable for LPHW and CHW installations

Vessels comply with EN 13831 and the Pressure Equipment Directive 2014/68/EU. Red epoxy powder coating (RAL 3002). Flexcon Premium 3580 are supplied with feet and a mounting kit.

Built for sealed heating (EN 12828) and chilled-water systems, Flexcon Premium Expansion Vessels stabilise system pressure by absorbing thermal expansion so plant runs safely and efficiently.

A new TPO (thermoplastic polyolefin) diaphragm on 1235 Ltrs models delivers high flexibility and extremely low permeability, helping the pre-charge hold for longer. Lighter construction cuts material use and transport emissions; packaging is FSC-certified to reduce CO₂ impact.

• Sustainable design lighter TPO membrane uses up to 50% less material
• Long service life 15-year warranty
• Low permeability pre-charge pressure maintained for longer
• Heating & cooling suitable for LPHW and CHW installations

Vessels comply with EN 13831 and the Pressure Equipment Directive 2014/68/EU. Red epoxy powder coating (RAL 3002). Flexcon Premium 3580 are supplied with feet and a mounting kit.

Built for sealed potable hot and chilled water systems in domestic and commercial settings, these Potable Water Expansion Vessels stabilise pressure by absorbing thermal expansion for safe, reliable operation.

A nitrogen pre-charge helps retain set pressure longer, while a single threaded steel connection with plastic insert provides a durable, non-flow-through design. Suitable for central heating, cooling and tap water applications (not for solar collector circuits).

• Nitrogen gas filling for longer pre-charge retention
• Single threaded steel connection with plastic insert (no flow-through)
• Potable use supports domestic hot/chilled water
• Heating & cooling compatible for sealed systems

Designed for long service life with broad operating limits and glycol tolerance for demanding installations.

WRAS approved horizontal design diaphragm expansion vessel for mains water installations

Built and tested according to EN 13831 Approval according to 2014/68/EC directive for pressure equipment.

- water-bearing parts corrosion resistant
- epoxy powder coating on the outside
- bladder to DIN EN 13831 / replaceable from 50 litres

Type: HW 25
Nominal volume: 25 l
Useful volume max: 20 l
perm. This product is manufactured by Reflex. operating temp: 70 °C
perm. op. overpressure: 10 Bar.
Gas inlet press ex works: 2 Bar.
Diameter: 280 mm
Height: 301 mm
Net weight: 5,5 kg
System connection: G 3/4
Nominal flow volume: - m³/h

The Reflex HW Home Booster Expansion Vessel - 25Ltr is a Pressure Vessel item.

The operating pressure of this is 10 bar.

Purpose-built for EN 12828 heating and chilled-water systems, this multifunction sealed-system unit combines automatic expansion control, pressurisation, deaeration and make-up in a single package.

Buy Flamco Flacomat VG Vessels from Pumpify and receive free standard delivery.

A pressure-step degassing process—using a controlled pressure drop and patented PALL-ring media—removes dissolved gases even at equilibrium. A replaceable butyl bladder stores the expansion fluid at atmospheric pressure. Supplied with Flexvent Super, height-adjustable feet and a weight-capacity sensor.

• All-in-one functionality — expansion, pressurisation, deaeration and make-up
• Pressure-step deaeration with PALL-ring technology
• Replaceable butyl bladder — easy maintenance and long service life
• Delivered complete — Flexvent Super, adjustable feet, weight-capacity sensor

Designed for commercial, industrial and residential sealed LPHW/CHW installations requiring efficient air removal and stable operating pressures.

Engineered for EN 12828 heating and chilled-water systems, Flamcomat FB Auxiliary Vessels provide additional, pressureless expansion capacity to stabilise sealed system pressures.

Used alongside the Flamcomat FG module, the FB vessel stores expansion fluid at atmospheric pressure inside a replaceable butyl bladder. The wider Flamcomat system employs a pressure-step degassing method with patented PALL-ring media for effective dissolved gas removal. Supplied with Flexvent Super and height-adjustable feet.

• Pressureless auxiliary vessel — increases system expansion volume
• Replaceable butyl bladder for easy maintenance
• Atmospheric storage of expansion fluid inside the bladder

Suitable for systems with a maximum operating temperature of 120 °C (note: additional requirements may apply above 110 °C). Bladder maximum temperature 70 °C.

Flamco Flexcon Expansion Vessel - 200Ltr - Engineered for EN 12828 heating and chilled-water systems, this Expansion Vessel stabilises sealed system pressure by absorbing thermal expansion in LPHW/CHW applications.

Maximum working pressure: 10.0 bar.

Vessels in accordance with EN13831.

Suitable for systems with a maximum system temperature of 120 °C.

Minimum/maximum temperature diaphragm: -10 / 90 °C.

Suitable for addition of glycol-based anti-freeze up to 50%.

A flexible rolling diaphragm with a ribbed profile prevents sticking and encourages inflow at the slightest pressure rise, while a nitrogen pre-charge helps maintain set pressure longer. The uncoated connection thread supports quick, watertight installation.

• Rolling-diaphragm design for smooth expansion control
• Nitrogen pre-charge for extended pre-pressure retention
• Top-quality steel with epoxy-powder finish
• Factory tested for reliability

Built for long service life in domestic, commercial and industrial plant rooms, with continuous medium temperatures from −10 to 70 C.

Flamco Flexcon M Expansion Vessel - 200Ltr - 3-6 bar. - Tailored for sealed heating and chilled-water systems, the Flexcon M 100/3.0 [6Bar] is a replaceable-bladder expansion vessel designed to stabilise pressure in accordance with EN 12828.

It excels where static pressure and safety-valve setpoint differ significantly, helping maintain pre-pressure while minimising cycling. Supplied ready to install with a pressure gauge and height-adjustable feet, plus an inspection flange for servicing.

• Replaceable butyl bladder for fast maintenance
• Pressure gauge and height-adjustable feet included
• Inspection flange for internal access
• Robust steel vessel with durable epoxy-powder finish
• Uncoated connection thread for easy, watertight installation

For larger models (12008000 Ltrs), a Flexvent Super can be fitted to enhance air removal.

Built for sealed heating and chilled-water circuits, the Flexcon M [10Bar] is a replaceable-bladder expansion vessel designed to stabilise system pressure in line with EN 12828.

It excels where static pressure and safety-valve setpoint differ significantly, helping maintain pre-pressure while reducing cycling. Supplied with a pressure gauge, height-adjustable feet and an inspection flange for straightforward servicing.

• Replaceable bladder for fast maintenance and long service life
• Delivered ready to install: gauge and adjustable feet included
• Inspection flange for internal access
• Robust steel vessel with durable epoxy-powder finish

Larger Flexcon M models (12008000 Ltrs) can be fitted with a Flexvent Super for enhanced air removal.

Purpose-built for solar thermal circuits, the Flexcon Solar 8/2.5 [8Bar] expansion vessel supports sealed systems in line with EN 12828, keeping pressure stable in high-temperature applications.

A preformed butyl rolling diaphragm with extremely low permeability helps retain pre-charge, while a nitrogen fill limits corrosion and pressure loss. The clench ring clamps the diaphragm evenly to prevent damage, and a ribbed profile avoids sticking for instant inflow. An uncoated connection thread aids watertight installation; the steel vessel is finished in a gleaming epoxy-powder coat and factory tested.

• Solar-ready expansion vessel for sealed systems
• Butyl rolling diaphragm with very low permeability
• Nitrogen pre-charge for longer pressure stability
• Clench ring construction for a robust, uniform seal

For 880 Ltrs models: both halves are coated before assembly to protect the clamp ring, and the nitrogen valve is countersunk and covered. Continuous medium temperature range −10 to 110 C.