BURKERT 466774 Type 2000 is a pneumatically operated 2/2-way angle seat valve designed for the controlled flow-rate of liquid and gaseous media. This specific model features a stainless steel body, a PA (Polyamide) actuator, FKM (Fluor rubber) seat seals, and an NPT 1 internal thread connection. It operates with Control Function B (normally open) and supports a medium temperature range of -10 °C to +130 °C.

INFO

The externally piloted angle seat valve is operated with a single or double-acting piston actuator. High flow rates are attained with the virtually straight flow path. The reliable self-adjusting packing gland provides high sealing integrity. These maintenance-free and robust valves can be retrofitted with a comprehensive range of accessories for position indication, stroke limitation, or manual override.

Product Structure

The angle seat valve consists of a pneumatically actuated piston actuator with an optical position indicator and a 2/2-way valve housing. The closing force is transferred via a spindle which is connected to the actuator piston.

Control Functions

Depending on the version, the valve is closed against the medium flow by spring force or by control pressure.

Control Function	Description
Control function A (CF A)	Pneumatically operated 2/2-way on/off valve. Normally closed by spring force.
Control function B (CF B)	Pneumatically operated 2/2-way on/off valve. Normally opened by spring force. (Model 466774 utilizes this function)
Control function I (CF I)	Pneumatically operated 2/2-way on/off valve. Double-acting, undefined rest position.

Flow Direction

Flow Direction Below Seat

Flow direction below seat is used for liquids, steam, and gases. As the medium pressure is under the pendulum disc, this pressure contributes to the opening of the valve. The flow inlet is under the valve seat.

Flow Direction Above Seat

Flow direction above seat is used for steam and gases only. Because the medium is above the pendulum disc, the operating pressure assists in closing the valve and sealing the valve seat.

Risk of Water Hammer

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

Parameter	Value
Operating medium	Steam, water, neutral gases, alcohols, oils, fuels, hydraulic fluids, salt solutions, alkalis, organic solvents
Control medium	Air, neutral gases
Viscosity	Max. 600 mm²/s
Degree of protection	IP67
Installation position	As required, preferably with actuator upright
Nominal pressure	PN 25 (DIN EN 1333), Class 150 (DIN EN 1759)

Pressure Limits

Discharge of medium and danger of bursting. If the permitted medium or control pressure is exceeded, lines or device may leak and burst. For control function B, a too low control pressure may result in leaks. Do not exceed medium pressure and control pressure.