Burkert Type 2300 (SKU 355464) is a pneumatically operated 2-way angle seat control valve ELEMENT. In line with Bürkert’s philosophy for modular valves and sensors, the construction of the Type 2300 angle-seat valve fulfils tough criteria for process environments. Unrivalled cycle life and sealing integrity are guaranteed by the proven self-adjusting packing gland. The parabolic trim results in a flow characteristic approximately 35% larger than conventional control valves.

This specific model (355464) features a DN32 weld end connection, a stainless steel valve body, a stainless steel seat seal, and operates with Control Function A (normally closed). It is designed for media temperatures ranging from -10 °C to +185 °C and operating pressures up to 6 bar. The design enables the easy integration of automation modules whether they are digital electropneumatic positioners or process controllers.

General Technical Data

Product properties	Description
Design	Angle seat control valve
Nominal diameter	DN 10...DN 65, NPS 3/8...NPS 2 1/2 (Model 355464 is DN 32)
Safety setting	Normally closed (control function A), normally open (control function B)
Flow direction	Flow to open (below seat)
Operating pressure	0 bar(g)...25 bar(g) (Model 355464 max 6 bar)
Nominal pressure	PN 25 (DIN EN 1333), Class 150 (DIN EN 1759)
Pilot pressure	5.6 bar(g)...7 bar(g)
Seat leakage	DIN EN 60534-4:2006 (Leakage class III and IV for Stainless steel)
Operating characteristic	Modified equal percentage
Process medium	Steam, water, neutral gases, alcohols, oils, fuels, hydraulic fluids, salt solutions, alkalis, organic solvents and oxygen
Medium temperature	-40 °C...+230 °C (Model 355464 is -10 °C to +185 °C)
Control medium	Air, neutral gases
Degree of protection	IP65/67

Control Functions

• Control function A (CF A): Pneumatically operated 2/2-way on/off valve. Flow direction below seat. Normally closed by spring force. (Applies to SKU 355464)
• Control function B (CF B): Pneumatically operated 2/2-way on/off valve. Flow direction below seat. Normally opened by spring force.
• Control function I (CF I): Actuating function via reciprocal pressurisation.

WARNING!

For control function I – risk of pilot pressure failure! With control function I, the control unit and reset are pneumatic. No defined position is reached during a pressure failure. To ensure a controlled restart of the device, first apply pilot pressure and then activate the medium.

Structure and Function

The angle-seat control valve consists of a pneumatically operated piston actuator, a control cone and a 2/2-way angle-seat valve body. The control cone is modularly connected to the actuator spindle via a spring-type straight pin, and can thus be quickly replaced.

Flow Direction Below Seat

Depending on the variant, the valve is closed against the medium flow either with spring force (control function A) or pilot pressure (control function B or I). Because the medium pressure is below the control cone, it helps open the valve.

WARNING!

Valve leak if there is too little minimum pilot pressure or high medium pressure! Minimum pilot pressure for CFB and CFI that is too low, or failing to meet the permitted medium pressure, can cause a leak in the valve seat. Adhere to minimum pilot pressure and do not exceed the medium pressure.

Materials

No.	Element	Material
1	Pilot air ports	Push-in connector PP (standard)
2	Actuator cover	PPS
3	Actuator casing	Stainless steel 1.4561 (316Ti)
4	Piston seal	FKM
5	Spring	Stainless steel 1.4310
6	Pipe	Stainless steel CF3M
7	Packing gland	PTFE V-rings (filled), with spring compensation
8	Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
9	Spindle guide	Stainless steel 1.4404 (316L)
10	Body seal	Graphite or PTFE
11	Control cone	Stainless steel 1.4571
12	Spring pin	Stainless steel 1.4310
13	Seat seal	Stainless steel 1.4571, PTFE or PEEK (Model 355464 uses Stainless steel)
14	Valve body	Stainless steel CF3M

Dimensions

Actuator

Nominal diameter (DN)	Actuator size	Ø A	B	H
15	50 (D)	64.5	166	163
20	70 (M)	91	189	186
25	70 (M)	91	191	188
32	90 (N)	120	201	197
40	130 (P)	159	296	296
50	130 (P)	159	312	312

(Note: Dimensions in mm. The dimensions for B and H are maximum dimensions and may be up to 6 mm less, depending on the nominal diameter and standard.)

Body with Welded Connection

Nominal diameter (DN)	DIN EN ISO 1127 / ISO 4200 (ES / CS / LS / Ø DS / WS)	DIN 11850-2 / DIN 11866 series A (ES / CS / LS / Ø DS / WS)
15	19 / 34 / 100 / 21.3 / 1.6	19 / 34 / 100 / 19 / 1.5
20	20 / 39 / 115 / 26.9 / 1.6	20 / 39 / 115 / 23 / 1.5
25	26 / 43 / 130 / 33.7 / 2.0	26 / 43 / 130 / 29 / 1.5
32	26 / 45 / 145 / 42.4 / 2.0	26 / 45 / 145 / 35 / 1.5
40	26 / 49 / 160 / 48.3 / 2.0	26 / 49 / 160 / 41 / 1.5
50	26 / 50 / 175 / 60.3 / 2.0	26 / 50 / 175 / 53 / 1.5

Installation Safety Instructions

DANGER!

Risk of injury from high pressure in the system! Before loosening lines and valves, turn off the pressure and vent the lines.

Risk of injury from electric shock! Before working on the device or system, switch off the power supply. Secure against reactivation.

WARNING!

Risk of injury when opening the actuator! The actuator contains a spring under tension. When the actuator is opened, the spring will jump out and may cause injuries. Do not open the actuator.

NOTE!

Damage to the seat seal or seat contour! When removing or installing the actuator, the valve must be in the open position. For control function A, pressurise the pilot air port 1 with compressed air (5 bar) to open the valve.