BURKERT 20093777 Type 6519 is a pilot-operated 5/2-way pneumatic solenoid valve. Together with Type 6518, they form a series of high-performance valves that can be used individually or on blocks. They operate without continuous air consumption and are used to control single- or double-acting actuators. The use of high-quality materials, such as Polyamide (PA), allows the valves to be used even in outdoor and chemically aggressive environments. With the monostable valve circuit functions, a safety level of SIL2 can be achieved in accordance with IEC 61508, depending on the architecture of the safety system.

General Technical Data

Product Properties	Specification
Seal Material	NBR and PUR (5/2-way), NBR (5/3-way)
Body Material	Pilot valve: Polyamide, reinforced glass-fibre. Main valve: Polyamide (5/2-way), aluminium (5/3-way)
Threaded Bushing	Brass (stainless steel on request)
Orifice	DN 6 to DN 9 (Model 20093777 is 6.00 mm)
Circuit Function	C, H, L, N, W and Z
Thermal Insulation Class	Polyamide coil class B, Epoxy coil class H
Compressed Air Quality	ISO 8573-1:2010, class 7.4.4
Duty Cycle	100 % continuous operation
Operating Medium	Neutral medium (e.g. lubricated or oil-free compressed dry air)
Electrical Connection	Plug contacts according to DIN EN 175301 - 803 form A
Pneumatic Connection	Threaded G 1/4, NPT 1/4, flange-mountable
Degree of Protection	IP65 with cable plug
Installation Position	As required, preferably with actuator upright

TIP

To prevent freezing of the expanded compressed air, the pressure dew point must be at least 10 K lower than the temperature of the medium.

Product Variants

Standard Variant

Type 6519 is a servo-assisted 5/2 or 5/3-way valve. The valve width of 32 mm allows high flow rates. The valves can be used separately or on blocks.

Product Properties	Coil size 24.5 mm	Coil size 32 mm
Weight	322 g (5/2-way)	478 g (5/2-way) / 720 g (5/3-way)
Opening Time	20 ms	20 ms
Closing Time	40 ms	40 ms
Operating Voltage	24 V DC	24 V DC, 24/110/230 V 50/60 Hz
Medium Temperature	-10 °C to +55 °C	-10 °C to +55 °C
Ambient Temperature	-25 °C to +55 °C	-25 °C to +55 °C

NAMUR Standard Variant

The valve, made of high-quality polyamide, can be operated as a 5/2 or 3/2-way valve by varying the mounting position of the side changeover plate. The NAMUR flange pattern enables simple field mounting directly on the pneumatic actuator.

Ex mb, Ex eb mb, and Ex ia Variants

The series also includes explosion-proof variants. Ex mb approval is achieved by fitting the valve with a corresponding push-over coil with a permanently moulded cable. The intrinsically-safe Type 6519 Ex ia valve consists of an intrinsically-safe pilot control and a pneumatic amplifier, ensuring reliable switching even after long shut-down periods.

WARNING

For Ex variants, the maximum medium temperature must never exceed the permitted temperature class (T4: +135 °C, T5: +100 °C, T6: +85 °C) minus 5 K.

Approvals and Conformities

• Explosion Protection: ATEX and IECEx approvals available for specific coils (Ex mb, Ex eb mb, Ex ia).
• North America (USA/Canada): UL Listed (UL 429, CAN/CSA-C22.2 No. 139-19), UL Recognized, and FM (Factory Mutual) Explosion Protection available optionally.

Dimensions

Standard Variant 5/2-Way Valve, Circuit Function H

(Dimensions in mm. Refer to the full manual for detailed dimensional drawings of all variants and plug forms.)