BURKERT 20064930 (Type 2100) is a pneumatically operated 2/2-way angle seat valve designed for decentralized process automation in hygienic, utility, and demanding industrial fluid applications. Configured with an SMS 3008 pipe weld end connection in nominal size DN65 (pipe outer diameter 63.5 mm, wall thickness 1.6 mm), this valve operates under Control Function A (normally closed by spring force). The process fluid enters below the valve seat, allowing safe shut-off of liquids, steam, and gases without water hammer risk.

The ELEMENT design platform integrates an internal pilot air routing system inside the stainless steel actuator, eliminating external tubing when paired with modular control heads. Spindle sealing relies on a self-adjusting PTFE V-ring packing gland with spring compensation, tested to Leakage Rate A according to DIN EN 12266-1. The valve provides full CIP and SIP capability, with wetted materials compliant with EC Regulation 1935/2004.

Technical Specifications

Specification Parameter	Value
Article Number	20064930
Valve Type	2100 ELEMENT
Construction	2/2-way angle seat valve, complete assembly
Nominal Diameter (Seat & Orifice)	DN 65 (2 1/2")
Port Connection Type	Weld end SMS 3008 (OD 63.5 mm, ID 60.3 mm, Wall 1.6 mm)
Face-to-Face Installation Length	230 mm
Flow Direction	Below the seat (flow to open)
Control Function	A: Normally closed by spring force (NC)
Flow Coefficient Kv (Water, 20 °C, Δp 1 bar)	85 m³/h
Maximum Operating Pressure	16 bar (15 bar for compressible fluids group 1 per PED 2014/68/EU)
Nominal Pressure Class	PN 25 (DIN EN 1333) / Class 150 (DIN EN 1759)
Minimum Pilot Pressure	5.6 bar
Maximum Pilot Pressure	7.0 bar
Medium Temperature Range	-10 °C to +185 °C
Ambient Temperature Range	-10 °C to +100 °C (threaded air port) / -10 °C to +60 °C (push-in connector)
Pilot Air Ports	Push-in connector Ø 6 mm (1/4") or G 1/8 thread
Seat Leakage Class	Rate A according to DIN EN 12266-1 (test medium: air)
Degree of Protection	IP65 / IP67, NEMA Type 4X

Materials of Construction

Item No.	Component	Material
1	Ground terminal	Stainless steel 1.4301 / 1.4305 (for ATEX execution)
2	Optical position indicator	Polysulfone (PSU)
3	Pilot air ports	Polypropylene (PP) standard push-in; G 1/8 stainless steel 1.4305 on request
4	Actuator cover	Polyphenylene sulphide (PPS)
5	Actuator casing	Stainless steel 1.4561 (316Ti)
6	Piston seal	Fluoroelastomer (FKM)
7	Actuator spring	Stainless steel 1.4310
8	Pipe / body extension	Stainless steel 1.4401 (316) / 1.4404 (316L)
9	Packing gland	Filled PTFE V-rings with spring compensation
10	Spindle	Stainless steel 1.4401 (316) / 1.4404 (316L)
11	Spindle guide	Polyether ether ketone (PEEK)
12	Body seal	Graphite (PTFE optional)
13	Swivel plate	Stainless steel 1.4401 (316) / 1.4404 (316L)
14	Seat seal	PTFE (Polytetrafluoroethylene)
15	Valve body	Stainless steel CF3M (cast 316L equivalent)

INFO

Lubricants utilized in the spindle packing gland and pneumatic actuator assembly are certified according to NSF H1 food-grade standards.

Dimensions and Actuator Sizing

BURKERT 20064930 is fitted with actuator size 130 mm (code P) to deliver shut-off against media pressures up to 16 bar.

Parameter	Dimension (mm)
Nominal Diameter DN	DN 65 (2 1/2")
Connection Standard	SMS 3008
Pipe Outer Diameter (DS)	63.5 mm
Pipe Wall Thickness (WS)	1.6 mm
End-to-End Installation Length (LS)	230 mm
Centerline to Weld End (ES)	26 mm
Centerline to Lower Flange / Body Base (CS)	56 mm
Actuator Size	Ø 130 mm (P)
Actuator Outer Diameter (Ø A)	159 mm
Overall Height from Centerline (B / H)	324 mm
Actuator Angle Clearance (K / M)	285 mm
Overall Height with Type 8690 / 8697 Control Unit	362 mm
Overall Height with Type 8691 / 8695 Control Head	386 mm

Flow Characteristics and Operating Principles

Article 20064930 operates with flow entering below the seat. In this configuration, fluid pressure acts beneath the swivel plate, assisting the opening motion when pilot pressure is supplied to pilot port 1. When pilot pressure vents, spring force acts downward to close the swivel plate against incoming media flow.

Flow Direction Recommendation

Flow direction below the seat is engineered for liquid media, steam, and gases. Closing against media flow prevents hydraulic shock (water hammer) in pipeline networks.

Water Hammer Prevention

Do not reverse fluid flow direction to above the seat when conveying liquid media. Liquid water hammer can cause rupture of pipelines and valve housings.

Pressure and Temperature Operating Limits

Operating limits are determined by the pressure-temperature rating of the body material and the standard pipe connection.

Medium Temperature (°C)	Maximum Operating Pressure PN25 (bar)	Maximum Operating Pressure Class 150 (bar)
-10 °C to +50 °C	25.0 bar	18.4 bar
+100 °C	24.5 bar	16.2 bar
+150 °C	22.4 bar	14.8 bar
+185 °C	21.0 bar	14.0 bar

For 20064930, the maximum operating pressure is 16 bar up to 140 °C, derating in accordance with the Class 150 curve at higher temperatures.

Installation and Welding Procedures

Prior to welding the stainless steel body into the piping system, the actuator must be separated from the body to protect the internal seals and spring mechanisms from thermal damage.

Disassembly Prior to Welding

1. Clamp the valve body firmly in a holding fixture.
2. Apply 5.0 bar compressed air to pilot air port 1 to pneumatically lift the swivel plate off the valve seat.
3. Position an open-end wrench on the wrench flats of the body connection.
4. Unscrew the actuator assembly from the valve body.
5. Keep the internal PTFE seat seal and graphite body seal clean and protected from welding debris.

Welding and Reassembly

1. Align pipeline ends precisely with the SMS 3008 weld spigots (63.5 mm OD × 1.6 mm).
2. Weld the body into the pipeline using orbital TIG or manual GTAW welding procedures.
3. Allow the welded joint to cool completely to ambient temperature.
4. Verify the seating face and thread inside the valve body are clean and undamaged.
5. Lightly lubricate the body connection thread with Klüberpaste UH1 96-402.
6. Pressurize pilot air port 1 with 5.0 bar compressed air to ensure the valve remains in the open position during installation.
7. Screw the actuator back into the body and tighten to the specified torque.

Nominal Diameter	Actuator Size	Tightening Torque	Tolerance
DN 15	40 (C), 50 (D), 63 (E)	45 Nm	+10 / -5 Nm
DN 20	40 (C), 50 (D), 63 (E), 80 (F)	50 Nm	+10 / -5 Nm
DN 25	50 (D), 63 (E), 80 (F)	60 Nm	+10 / -5 Nm
DN 32	63 (E), 80 (F), 100 (G)	65 Nm	+10 / -5 Nm
DN 40	63 (E), 80 (F), 100 (G), 125 (H)	65 Nm	+10 / -5 Nm
DN 50	70 (M), 90 (N), 130 (P)	70 Nm	+10 / -5 Nm
DN 65	90 (N), 130 (P)	70 Nm	+10 / -5 Nm
DN 80	125 (H), 130 (P)	120 Nm	+10 / -5 Nm

Rotating the Actuator Assembly

The pilot air connections can be rotated continuously over 360° to adjust to pneumatic tubing layouts.

Rotation Precaution

Rotate the actuator only in the designated clockwise direction indicated on the housing. Turning in the opposite direction risks loosening the threaded body connection joint.

1. Secure the valve body in a holding device.
2. Pressurize pilot air port 1 with 5.0 bar compressed air so the valve seat is in the fully open position.
3. Hold the body connection hexagon with one open-end wrench.
4. Apply a second wrench to the actuator drive connection nut and rotate clockwise to the required angular position.

Pneumatic Connections

Pilot air supply lines connect to pilot port 1 (marked on the actuator cover). For standalone valves, the supplied exhaust silencer is installed into free port 2. In aggressive process environments, route free exhaust ports via pneumatic tubing into a neutral atmosphere.

• Minimum pilot pressure: 5.6 bar
• Maximum pilot pressure: 7.0 bar
• Control medium: Neutral gases, filtered compressed air
• Tubing connection: 6 mm (1/4") outer diameter push-in connector or G 1/8 thread

Maintenance and Visual Inspection

Inspect the valve at regular maintenance intervals for external tightness and mechanical integrity.

Inspection Zone	Check Item	Corrective Action
Media Connectors (1)	Pipeline weld joints and body connection	Tighten body connection or reweld line connection
Relief Bore (2)	Spindle packing gland tightness	Replace packing gland seal kit or complete actuator
Valve Seat / Swivel Plate (3)	Internal seat tightness across the port	Replace the swivel plate and PTFE seat seal kit

Troubleshooting Guide

Malfunction	Possible Cause	Corrective Action
Actuator does not actuate	Pilot air connected to wrong port	Connect control pressure to pilot air port 1
	Pilot air pressure below 5.6 bar	Increase pilot air pressure to between 5.6 and 7.0 bar
	Operating fluid pressure exceeds 16 bar	Regulate media pressure within operating limits
Valve seat passes fluid when closed	Operating pressure exceeds spring force	Verify line pressure does not exceed 16 bar
	Solid particles trapped on seat	Flush line; install upstream strainer (mandrel size 1 mm)
	PTFE seat seal worn or damaged	Install replacement swivel plate kit
Medium escapes from relief bore	Packing gland V-rings worn	Replace packing gland set using installation tool 683223

Approvals and Standards Compliance

• Pressure Equipment Directive: 2014/68/EU
• Machinery Directive: 2006/42/EC
• Food Contact Suitability: EC Regulation 1935/2004 manufacturer declaration
• Quality Test Certificate: EN 10204 3.1 inspection certificate enclosed
• ATEX Mechanical Compatibility: Conforms to EPS 18 ATEX 2 008 X / IECEx EPS 18.0007 X (Ex h IIC T4...T2 Gb, Ex h IIIC T135 °C...T300 °C Db) when configured with electrical bonding terminal