Solenoid valve 2/2 N.C. 1/2 10.5 EV2, brass with NBR seal – code: D266DBU-7200 – HP Watermakers

2/2 N.C. solenoid valve G 1/2″ with NBR seal for water systems

The’2/2 way normally closed (N.C.) solenoid valve HP Watermakers with G 1/2″ connection it is a component intended for automatic control of fluid flow in water circuits. The configuration indicated as EV2 features brass body and NBR seals, with coil series 7200 for power supply 24 V AC 50/60 Hz.

This valve is designed for integration in technical systems (particularly in nautical and onboard maintenance fields), where a reliable electric control for opening/closing a hydraulic line is required. The spare part reference code is D266DBU-7200.

Features and construction details

The valve is a diaphragm operated to 2 ways with logic normally closed: in the absence of electrical power, the fluid passage remains closed. This configuration is typical of applications where it is desired that the system goes to a closed condition when no command is present.

Technical data (confirmed)

• Manufacturer / Brand: HP Watermakers
• Product code: D266DBU-7200
• Type: solenoid valve 2/2 way N.C.
• Connection: G 1/2″
• Nominal diameter: 10.5 mm
• Body material: Brass CW617N EN 12165
• Seal material: NBR
• Coil: 7200
• Coil power supply: 24 V AC 50/60 Hz
• Degree of protection: IP65 (with connector)

Hydraulic data (confirmed)

• Minimum operating pressure: 0.1 bar
• Maximum pressure with AC power supply: 16 bar
• Flow coefficient (kvs): 25 l/min

Construction features

The construction configuration shown for this model includes:

• Brass valve body (CW617N EN 12165);
• Internal pilot in stainless steel;
• Membrane and seals in NBR;
• Coil series 7200 for power supply 24 V AC 50/60 Hz.

Typical applications (nautical and plant engineering)

In systems HP Watermakers this solenoid valve is used as an electrically controlled shut-off device, useful for automatically managing the water circuit flow. In particular, it can be used to:

• automatically control the water flow in a line;
• open or close a hydraulic section via electric control;
• manage operational phases of the system (for example loading, unloading or water circuit control), according to the logic of the system in which it is installed.

The type 2/2 N.C. it is indicated when a “fail-close” behavior is desired: without power the valve remains closed, helping to keep the line shut off when the control is not active.

Advantages for maintenance and spare parts

In a technical spare parts context, clarity of identification and data consistency are essential. This model offers precise references for replacement and procurement:

• Unique identification by code D266DBU-7200 and coil 7200;
• N.C. Configuration. suitable for automatic shut-off logics;
• G 1/2″ connection and DN 10.5 mm for integration in compatible lines;
• Declared materials (brass CW617N EN 12165, NBR seals) useful for compatibility assessments of the circuit;
• IP65 protection (with connector) for installations where adequate coil protection is required.

Usage and operational notes

Operating logic

• Normally closed (N.C.): without electrical power the fluid passage is closed.
• Diaphragm operated: typical solution for automatic shut-off in water circuits.

Replacement selection guidelines

For correct replacement, verify the correspondence of the main parameters listed in the datasheet: code D266DBU-7200, G 1/2″ connection, DN 10.5 mm, coil 7200 with 24 V AC 50/60 Hz and NBR seals. In case of doubts about the system configuration, it is advisable to also compare the type (2/2 way N.C.) and the intended use in the circuit.

Note on protection rating

The indicated protection rating is IP65 (with connector): to maintain this condition it is necessary to use the appropriate connector and ensure correct assembly.

Indicated fluids

The valve is suitable for automatic shut-off of compatible fluids, in particular water; the description also mentions air and oil. The compatibility check with the specific fluid and the actual plant conditions remains the responsibility of the installation/design.

FAQ – Frequently Asked Questions

What does 2/2 N.C. mean for this solenoid valve?

“2/2” indicates a 2-way valve with 2 positions. “N.C.” (normally closed) means that, in the absence of electrical power, the fluid passage remains closed.

What is the coil power supply and which series is indicated?

The coil is indicated as series 7200 and is powered by 24 V AC 50/60 Hz.

What are the nominal pressure and diameter of the valve?

The connection is G 1/2" and the nominal diameter indicated is 10.5 mm.

Which materials are declared for body and seals?

The valve body is made of CW617N EN 12165 brass, while the seal (diaphragm and seals) is made of NBR.

What is the product code to correctly identify the spare part?

The product code listed for this model is D266DBU-7200 (HP Watermakers).