BURKERT 340618 Type 0290 is a servo-assisted 2/2-way diaphragm valve. The valve opens without differential pressure. The opening process is facilitated by the fix-coupling of the diaphragm to the magnetic core. The integrated 'soft-kick' function ensures gentle opening. Various diaphragm materials are available depending on the actual application. The solenoid coils are moulded with an epoxy that has a high level of chemical resistance. Kick and drop electronics are moulded into all DC solenoid variants for reduced electrical power consumption.

General Technical Data

Product properties
Seal	NBR, FKM, EPDM
Body	Brass, stainless steel 1.4581
Coil	Epoxy
Valve inner parts	Brass, stainless steel
Orifice (Standard variant)	DN 12...DN 50
Thermal insulation class	Epoxy coil class H
Duty cycle	100 % continuous operation (unless otherwise specified)
Voltage tolerance	±10%
Degree of protection	IP65 with cable plug
Installation position	As required, preferably with actuator upright

Medium Data

Seal material	Permitted media	Medium temperature
NBR	Neutral gases and liquids (e.g. compressed air, water, hydraulic oil)	-10 °C...+80 °C
FKM	Per solutions, hot oils with additives	0 °C...+120 °C
EPDM	Oil-free and fat-free media, (e.g. hot water)	-30 °C...+100 °C

Circuit Functions

Symbol	Description
CF A	Circuit function A (CF A) 2/2-way solenoid valve Servo-controlled Normally closed

Materials

No.	Element	Material
1	Coil	Epoxy
2	Stopper	Stainless steel 1.4105, 1.4113 or 1.4523 (optional)
3	Shading ring (AC variant only)	Brass variant: copper Stainless steel variant: silver
4	Spring	Stainless steel 1.4310
5	Magnetic core	Stainless steel 1.4105 or 1.4113
6	Core guide tube	Stainless steel 1.4303
7-9	O-ring	NBR, FKM, EPDM
10	Diaphragm plate	Brass variant: CuZn37 Stainless steel variant: 1.4401
11	Diaphragm	NBR, FKM, EPDM
12	Body	Brass or stainless steel 1.4581
13	Pilot valve seat	Brass variant: MS Stainless steel variant: 1.4401
14	Seat seal	NBR, FKM, EPDM

Dimensions

Threaded Variant

Note

• Dimensions in mm
• The dimensions D1 and F1 apply to G thread.
• The dimensions D2 and F2 apply to NPT thread.

Performance Specifications

Power Consumption (Standard Variant)

Orifice [mm]	Kv value water P→A [m³/h]	Port connection	Inrush power AC [VA]	Holding power AC [VA/W]	Weight [kg]
12	1.8	G 1/2	100	25/10	1.0
20	6.5	G 3/4	120	32/16	1.4
25	10.0	G 1	120	32/16	1.8
32	16.0	G 1 1/4	120	32/16	2.7
40	16.0	G 1 1/2	120	32/16	3.1
50	38.0	G 2	-	-	6.5

Safety Instructions

DANGER!

Risk of injury from high pressure in the system ▶ Before loosening lines or valves, switch off the pressure and vent the lines.

Risk of injury from electric shock ▶ Before reaching into the device or the system, switch off the power supply and secure it against reactivation. ▶ Observe the applicable accident prevention and safety regulations for electrical devices.

WARNING!

Risk of injury due to improper installation ▶ Installation may only be performed by trained technicians and with the appropriate tools.

Risk of injury from unintentional activation of the system and uncontrolled restart ▶ Secure the system against unintentional activation. ▶ Ensure a controlled restart after installation.

Before Installation

Dirt trap: for safe operation of the solenoid valve, a dirt trap (≤400µm) must be installed before the valve inlet.