BURKERT 20072611 (Type 5282) is a servo-assisted 2/2-way diaphragm solenoid valve designed to control, shut off, and meter neutral media up to a viscosity of 21 mm²/s. A minimum differential pressure of 0.5 bar is required for the valve to open the full cross-section. The 20072611 model features a brass body with a G2 internal thread, FKM seals for medium temperatures up to 90 °C, and operates on 24 V. It includes ATEX/IECEx explosion protection (Ex mb tb IIIC T130°C Db, Ex eb mb IIC T4 Gb) and provides an IP65 degree of protection when correctly connected.

The valve incorporates a separating diaphragm for aggressive and contaminated media, and the closing and opening times can be adjusted individually via side throttle screws. The 3/2-way pilot valve can be converted from NC (Normally Closed) to NO (Normally Open) circuit function by rotating it 180° on the armature.

Circuit Functions

The 20072611 model operates with Circuit Function A (Normally Closed).

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

Approvals and Conformities

• Explosion Protection: ATEX (EPS 16 ATEX 1 111 X, II 2G Ex eb mb IIC T4 Gb, II 2D Ex mb tb IIIC T130 °C Db) and IECEx (IECEx EPS 16.0049X, Ex eb mb IIC T4 Gb, Ex mb tb IIIC T130 °C Db).
• North America: UL Listed (UL 429, UL 429A), UL Recognized, CSA 139, and FM Explosion Protection for Hazardous Locations.
• Drinking Water: Materials comply with UBA assessment principles (TrinkwasserV). PF39 suitable for max +85 °C, PF36 suitable for max +60 °C.
• DNV GL Classification: Accepted for installation on all vessels classed by DNV GL.

Material Specifications

No.	Element	Material
1	Coil	Epoxy
2	O-ring	NBR, EPDM, FKM
3	Cover	Brass (DN 13 stainless steel 1.4408/316, DN 20...DN 50 stainless steel 1.4581/316CB)
4	Spring	Stainless steel 1.4310/302
5	Diaphragm	NBR, EPDM, FKM
6	Diaphragm holder	Brass, stainless steel 1.4401/316
7	Valve body	Brass (DN 13 stainless steel CF3M, DN 20...DN 50 stainless steel 1.4581/316CB)
8	Manual override	PA

Dimensions

Threaded Variant

Note: Dimensions in mm. The dimensions D1 and F1 apply to G thread.

DN	A1	B1	G (D1)	G (F1)	E1	L1	SW
13	109.0	123.0	G 1/2	14	40	65	27
20	115.0	131.0	G 3/4	16	60	100	32
25	121.5	142.0	G 1	18	70	115	41
32	122.0	147.0	G 1 1/4	20	85	126	50
40	126.0	156.0	G 1 1/2	22	85	126	60
50	142.5	177.5	G 2	24	115	164	70
65	142.5	185.0	G 2 1/2	27	115	180	85

Installation and Operation

Installation Recommendation

To ensure that the solenoid valve functions reliably, a dirt filter (≤ 500 µm) must be installed in front of the valve inlet.

Breakage Risk

Do not use the coil as a lever arm during installation. Hold the device with a suitable open-end wrench on the body and screw into the pipeline.

Manual Emergency Actuation

When the manual emergency actuation is locked, the valve can no longer be actuated electrically.

Changing Valve Function

The delivery condition corresponds to the order key. Turning the pilot valve through 180° changes the circuit function of the valve. The circuit function can only be changed for variants up to 10 bar.

Leakage Hazard

If the O-rings are forgotten or incorrectly inserted during installation of the pilot valve, the device will be damaged and medium will be discharged. Before screwing in the pilot valve, correctly insert O-rings into the depressions.

• Function NC: The pilot valve is installed in such a way that the manual emergency actuation points in the direction opposite to the direction of flow arrow.
• Function NO: The pilot valve is installed in such a way that the manual emergency actuation points in the same direction as the identification for the flow direction.

Setting the Switching Times

The closing and opening times of the valve can be changed if required with the side throttle screws.

Pressure Surges

If closing times are fairly short, liquid media cause higher pressure surges. These may reduce the service life of the diaphragm and destroy other devices and components in the system. Discharge of medium occurs if the throttle screws are unscrewed too far.