BURKERT 344633 (Type 2000) is an externally piloted angle seat valve operated with a single-acting piston actuator. The actuator is made of PA (Polyamide), suitable for demanding ambient temperatures. High flow rates are attained with the virtually straight flow path of the 2/2-way stainless steel body. The reliable self-adjusting packing gland provides high sealing integrity. This maintenance-free and robust valve features a clamp connection and PTFE seat seal, making it ideal for the controlled flow of liquid and gaseous media in industrial and hygienic applications.

Product Structure and Materials

No.	Element	Material (Stainless steel body CF3M with PA actuator)
1	Transparent cover	PC
2	Pilot air ports	Stainless steel 1.4305
3	Actuator	PA
4	Piston seal	NBR
5	Packing gland	PTFE V-Rings (filled), with spring compensation
6	Spring	Stainless steel 1.4310
7	Pipe	Stainless steel CF3M
8	Wiper	PTFE (filled)
9	Body seal	Graphite, PTFE (option)
10	Spindle	Stainless steel 1.4401 / 1.4404
11	Pin	Stainless steel 1.4401 / 1.4404
12	Seat seal	PTFE
13	Valve body	Stainless steel CF3M
14	Swivel plate	Stainless steel CF3M / 1.4401 / 1.4404

Control Functions

Symbol	Description
Control function A (CF A)	Pneumatically operated 2/2-way on/off valve. Flow direction below seat. Normally closed by spring force.
Control function B (CF B)	Pneumatically operated 2/2-way on/off valve. Flow direction below seat. Normally opened by spring force.

Risk of damage due to bursting pipes

Risk of damage due to bursting pipes and bursting equipment when the flow is above the seat. In the case of liquid mediums, water hammer can occur, causing pipes and the device to burst. Do not use valves with flow above the seat for liquid mediums.

Technical Data

Property	Value
Operating pressure	0 bar(g)...25 bar(g), vacuum variants...-0.9 bar(g) (option)
Nominal pressure	PN 25 (DIN EN 1333), Class 150 (DIN EN 1759)
Pilot pressure	2...10 bar(g)
Seat leakage	Leakage rate A (DIN EN 12266-1), seat seal PTFE and PEEK, test medium air
Operating medium	Steam, water, neutral gases, alcohols, oils, fuels, hydraulic fluids, salt solutions, alkalis, organic solvents, oxygen and fuel gases
Medium temperature	-40...+230 °C (depending on variant)
Viscosity	Max. 600 mm²/s
Control medium	Air, neutral gases
Ambient temperature	-40...+60 °C (for PA actuator)
Degree of protection	IP67
Installation position	As required, preferably with actuator upright

Dimensions

Note: The dimensions for B, H, K, M, HS and BS are maximum dimensions and may be up to 6 mm less, depending on the nominal diameter and standard.

Installation and Maintenance

Installation Recommendation

The angle seat valve can be installed in any position, preferably with the actuator face up. Before connecting the valve, ensure the pipelines are flush and stress-free. Observe the direction of flow.

High Pressure Hazard

Risk of injury from high pressure in the system! Turn off the pressure and vent the lines before loosening lines or valves.

Maintenance Work: The actuator of the angle seat valve is maintenance-free. Parts which are subject to natural wear include the pendulum disc and graphite seal. If leaks occur, replace the particular wearing part with an appropriate original spare part.