Stainless steel pressure vessel CH 90 L

Product detailed description

Pressure vessels are essential components in water supply and heating systems, particularly in residential and industrial pumping applications. They serve as storage units for pumped water and help stabilise pressure fluctuations. The Centrometal CH 90 L is a vertical, membrane-free pressure vessel made entirely of stainless steel, suitable for integration into both water supply and heating systems. It is commonly used in domestic water storage, boiler systems and heating circuits where direct or potential contact with potable water exists.

This model is designed for use in environments where water quality and long-term durability are critical. The absence of an internal membrane simplifies maintenance and ensures compatibility with a wide range of pump configurations. It is manufactured in accordance with the European Parliament directive 97/23/EC, ensuring compliance with essential safety and performance standards for pressure equipment.

Technical parameters

EAN	8585054509935
Volume (l)	90
Dimensions H x W x D (cm)	64x52
Weight	17 kg
Code	PR_38227
Brand	Centrometal

The capacity of 90 litres allows for efficient water storage and pressure regulation in medium-sized systems. The maximum working pressure must be matched to the pump specifications to ensure safe and effective operation. The operating temperature range supports installation in a variety of environments, from unheated utility rooms to standard indoor conditions.

Installation and connection

The vessel is installed vertically and requires secure mounting to prevent movement during operation. Connection is typically via threaded inlets, which must be verified against the pump or system requirements. The inlet size should be matched to the pump’s discharge port to avoid flow restrictions. A pressure gauge and air valve are often added externally for monitoring and adjustment. Common mistakes include incorrect orientation, undersized piping and failure to bleed trapped air from the system before commissioning. Always verify the pump’s maximum pressure rating to ensure compatibility with the vessel’s design limits.

Compatibility and accessories

This pressure vessel is compatible with all pump types that operate within its pressure and volume parameters. It is often used alongside water heaters, expansion tanks and circulation systems. Additional components such as pressure switches, pressure gauges and air valves are usually required for complete system functionality. These accessories must be selected based on the specific system configuration and pump type.

Technical background for designers

The vessel operates by storing water under pressure, reducing the frequency of pump cycling and maintaining stable pressure levels. The stainless steel construction ensures resistance to corrosion and contamination, making it suitable for potable water systems. The absence of an internal membrane eliminates the risk of membrane degradation and simplifies long-term maintenance. The vessel integrates directly into closed-loop systems and can be sized according to the system’s flow rate and pressure requirements. Longevity is influenced by water quality, system pressure and regular inspection of seals and fittings.

Service and operation

Routine checks should include verifying the pressure level, inspecting for leaks and ensuring the air valve functions correctly. The vessel does not require scheduled service intervals but should be monitored for signs of wear or pressure loss. If the pressure drops below the system’s minimum requirement, the air valve can be used to re-pressurise the tank. Any visible damage or unusual noise should prompt further investigation to identify potential issues with the pump or system integrity.

Frequently asked questions

Can the Centrometal CH 90 L be used with a variable speed pump?
Yes, provided the pump’s maximum operating pressure does not exceed the vessel’s rated capacity. Variable speed pumps benefit from the stabilising effect of the pressure vessel, reducing wear and extending pump life.

Is the tank suitable for outdoor installation?
The operating temperature range includes down to -10°C, making it suitable for outdoor use in protected locations. However, insulation is recommended in colder climates to prevent freezing of internal components.

How is the tank pressurised during installation?
The tank is equipped with a standard air valve for manual inflation. The initial pressure should be set to match the system’s minimum operating pressure, ensuring optimal performance and preventing over-pressurisation.

Can this model replace a membrane-type pressure vessel?
Yes, in systems where membrane replacement is no longer cost-effective. The membrane-free design offers similar functionality with reduced long-term maintenance requirements, provided the system operates within the specified pressure range.