Burkert 20113210 (Type 2100) is a pneumatically operated 2/2-way angle seat valve from the ELEMENT series, specifically engineered for decentralized process automation in hygienic, utility, and demanding processing installations. Configured with Control Function A (normally closed by spring force), flow direction below the seat, and a DN 15 clamp process connection according to DIN 32676 series A, the valve regulates and isolates neutral gases, steam, water, alcohols, oils, fuels, hydraulic fluids, saline solutions, alkalis, and organic solvents.

Article 20113210 couples a cast stainless steel CF3M angle seat body with an actuator size Ø 70 mm (Size M) composed of a polyphenylene sulphide (PPS) cover and a 1.4561 (316Ti) stainless steel casing. The internal flow path delivers a water flow coefficient Kv of 5.4 m³/h at 1 bar differential pressure. Stem sealing is maintained by a self-adjusting PTFE V-ring packing gland with integrated spring compensation and a PEEK spindle guide, achieving tightness in accordance with DIN EN 12266-1 Leakage Rate A. All wetted materials meet Regulation (EC) 1935/2004 and FDA requirements according to manufacturer declarations, supporting full Clean-in-Place (CIP) and Steam-in-Place (SIP) procedures.

Principle of Operation and Flow Path

Burkert 20113210 operates under Control Function A (CFA). In its unpressurized rest position, the valve is held closed by actuator spring force acting on the spindle and the stainless steel swivel plate. Supplying compressed air (minimum 4.8 bar(g), maximum 10 bar(g)) to pilot air port 1 lifts the piston and retracts the swivel plate, opening the valve passage.

Because the process media enters below the valve seat, the operating line pressure assists the pneumatic actuator in opening the valve. This flow-to-open orientation prevents water hammer when controlling liquids, steam, and gases.

Operating Restriction: Liquid Media Direction

Valves with flow direction above the seat must never be used for liquid media due to the risk of destructive hydraulic shock (water hammer) that can burst pipelines and equipment. Burkert 20113210 is factory-configured for flow below the seat, which is suitable for liquids, steam, and gases up to 25 bar(g).

Material Specifications

All construction materials for Burkert Type 2100 are selected for chemical compatibility and resistance to harsh process atmospheres. Lubricants utilized in the actuator and stem packing gland comply with NSF H1 classification.

Item	Component	Standard Material Execution	Notes for Article 20113210
1	Ground terminal	Stainless steel 1.4301 / 1.4305	ATEX variants only
2	Optical position indicator	Polysulfone (PSU)	Integrated visual indicator
3	Pilot air ports	Polypropylene (PP) push-in connector	External Ø 6 mm (1/4") push-in
4	Actuator cover	Polyphenylene sulphide (PPS)	ELEMENT design
5	Actuator casing	Stainless steel 1.4561 (316Ti)	High mechanical and chemical resistance
6	Piston seal	FKM	Pneumatic actuator sealing
7	Spring	Stainless steel 1.4310	CFA closing spring pack
8	Pipe	Stainless steel 1.4401 (316) / 1.4404 (316L)	Internal guide tube
9	Packing gland	PTFE V-rings (filled)	Spring-compensated self-adjusting pack
10	Spindle	Stainless steel 1.4401 (316) / 1.4404 (316L)	Precision ground stem
11	Spindle guide	PEEK	Low-friction guidance
12	Body seal	Graphite (PTFE optional)	Bonnet-to-body seal
13	Swivel plate	Stainless steel 1.4401 (316) / 1.4404 (316L)	Articulated seal carrier
14	Seat seal	PTFE	Soft shut-off disc (PEEK optional)
15	Valve body	Stainless steel CF3M	Cast equivalent of 316L stainless steel

Technical Performance and Operating Parameters

Article 20113210 operates within the fluidic and pressure specifications detailed below. Data reflects flow direction below the seat with PTFE seat sealing.

Technical Parameter	Specification Value
Valve Type	2100 ELEMENT
Article Number	20113210
Control Function	Control Function A (normally closed by spring force)
Nominal Diameter (Port)	DN 15
Seat Orifice Diameter	15 mm
Flow Coefficient Kv (Water, +20 °C, 1 bar Δp)	5.4 m³/h
Flow Direction	Flow to open (below seat)
Operating Pressure Range	0 bar(g) to 25 bar(g)
Nominal Pressure Rating	PN 25 (DIN EN 1333) / Class 150 (DIN EN 1759)
Minimum Pilot Pressure	4.8 bar(g)
Maximum Pilot Pressure	10 bar(g)
Actuator Size	Ø 70 mm (Size M)
Process Connection Standard	Clamp DIN 32676 series A (matching DIN 11850 series 2 pipe)
Process Connection Dimensions	Flange Ø 34.0 mm, pipe Ø 19.0 x 1.5 mm (ID 16.0 mm)
Face-to-Face Body Length	130 mm (clamp body LC) / 100 mm (valve body weld core LS)
Pneumatic Pilot Connection	Push-in connector for Ø 6 mm (1/4") outer diameter hose
Medium Temperature Range	-10 °C to +185 °C
Ambient Temperature Range	-10 °C to +60 °C (restricted by push-in pilot fitting)
Max. Permissible Viscosity	600 mm²/s
Control Medium	Filtered air, neutral gases
Seat Leakage Rate	Leakage rate A according to DIN EN 12266-1 (air test)
Sound Pressure Level	< 70 dB(A)

Dimensions and Actuator Interface

Dimensions depend on the actuator size and the process connection type. Burkert 20113210 combines a DN 15 body with an actuator size Ø 70 mm (M).

Actuator Dimensions Across Series 2100

Nominal Diameter DN	NPS	Actuator Size	Ø A [mm]	B [mm]	H [mm]	K/M [mm]
15	1/2	50 (D)	64.5	166	163	147
15 (20113210)	1/2	70 (M)	91.0	182	178	156
20	3/4	50 (D)	64.5	174	171	155
20	3/4	70 (M)	91.0	189	186	163
25	1	50 (D)	64.5	175	173	156
25	1	70 (M)	91.0	191	188	165
25	1	90 (N)	120.0	229	228	203
32	1 1/4	70 (M)	91.0	201	197	174
32	1 1/4	90 (N)	120.0	243	242	217
40	1 1/2	70 (M)	91.0	204	201	178
40	1 1/2	90 (N)	120.0	246	245	220
50	2	70 (M)	91.0	223	219	196
50	2	90 (N)	120.0	262	261	236

Note: Dimensions B, H, K, and M represent maximum envelope values and may vary downward by up to 6 mm based on connection orifice and standard tolerances.

Clamp Connection Dimensions (DIN 32676 Series A and B)

Connection Standard	Nominal Size DN	Overall Length LC [mm]	Centerline Height CC [mm]	Clamp Flange Ø D1 C [mm]	Pipe Outer Ø D2 C [mm]	Wall Thickness SC [mm]
DIN 32676 Series A (20113210)	DN 15	130	49.5	34.0	19.0	1.5
DIN 32676 Series A	DN 20	150	57.0	34.0	23.0	1.5
DIN 32676 Series A	DN 25	160	58.5	50.5	29.0	1.5
DIN 32676 Series A	DN 32	180	58.0	50.5	35.0	1.5
DIN 32676 Series A	DN 40	200	69.5	50.5	41.0	1.5
DIN 32676 Series A	DN 50	230	78.0	64.0	53.0	1.5
DIN 32676 Series B	DN 15	156	49.0	50.5	21.3	1.6
DIN 32676 Series B	DN 20	150	56.5	50.5	26.9	1.6
DIN 32676 Series B	DN 25	160	58.0	50.5	33.7	2.0
DIN 32676 Series B	DN 32	200	57.5	50.5	42.4	2.0
DIN 32676 Series B	DN 40	200	69.0	64.0	48.3	2.0
DIN 32676 Series B	DN 50	230	77.5	77.5	60.3	2.6

Pressure and Temperature Operating Limits

Maximum allowable operating pressure decreases as media temperature increases, determined by pressure vessel design standards DIN EN 12516-1 (PN 25) and ASME B16.34 (Class 150).

Pressure Derating According to Pressure Standards

Temperature [°C]	DIN EN 12516-1 / PN 25 Max. Pressure [bar]	ASME B16.34 Cl. 150 Max. Pressure [bar]	JIS B 2220 10K Max. Pressure [bar]
-10 to +38 / +50	25.0	19.0	14.0
+100	24.5	16.2	14.0
+150	22.4	14.8	13.4
+200	20.3	13.7	12.4
+230	19.0	12.7	11.7

Temperature Boundaries for Pneumatic Connections

When configured with push-in pneumatic connectors (as on article 20113210), ambient temperature must remain between -10 °C and +60 °C across the full media temperature range (-10 °C to +185 °C). If fitted with metal threaded G 1/8" pilot ports, the ambient limit extends to +100 °C.

Mechanical and Pneumatic Installation

Burkert 20113210 can be mounted in any orientation, although an upright actuator position is preferred to maximize service life and prevent sedimentation in the packing cavity.

Pipeline Connection and Welding Precautions

1. Ensure that pipeline flanges and clamp gaskets are clean, free of particulate contamination, and concentric with the valve port.
2. For welded valve bodies, the pneumatic actuator must be unscrewed from the body before welding into the pipeline to prevent thermal destruction of the PTFE packing gland and FKM seals.
3. Reinstall the actuator once the body has fully cooled to ambient temperature.

Actuator Dismantling and Assembly Procedure

Valve Position During Actuator Removal or Assembly

To prevent irreparable deformation of the seat seal and swivel plate, the valve must be in the fully open position whenever the actuator is removed from or threaded into the valve body. For Control Function A (normally closed), pressurize pilot air port 1 with compressed air at 5.0 bar to retract the plug before turning the body connection.

Step	Procedure
1. Secure Valve	Clamp the valve body firmly in a vice or holding fixture.
2. Actuate Open	Apply 5.0 bar compressed air to pilot port 1 to open the valve plug fully.
3. Apply Wrench	Place an open-end wrench on the wrench flat of the body connection hexagon.
4. Disassemble / Assemble	Unscrew or torque down the actuator assembly.
5. Tightening Torque	Torque the body connection to 45 Nm (+10/-5 Nm) for DN 15 (actuator sizes 40, 50, and 70 mm).

Rotating the Actuator 360°

The pneumatic pilot air ports can be continuously rotated through 360° to accommodate tight plant piping layouts.

Rotation Direction Restriction

Only rotate the actuator in the specified counterclockwise direction relative to the body connection hexagon while holding the body connection flat with a counter-wrench. Turning in the wrong direction loosens the body connection thread, causing media leakage.

1. Secure the valve body in a holding device.
2. Pressurize pilot air port 1 with 5.0 bar compressed air to hold the valve open.
3. Hold the body connection hexagon nut with an open-end wrench.
4. Apply a second open-end wrench to the hexagon nut of the actuator connection.
5. Rotate the actuator connection nut until the pilot ports reach the desired position.

Pneumatic Line Connection

• Connect pilot air supply to pilot air port 1 (push-in fitting for 6 mm / 1/4" hose).
• Connect the supplied silencer or a neutral vent line to exhaust port 2.
• Ensure control air is dry, unlubricated instrument air according to ISO 8573-1.

Maintenance and Troubleshooting

Burkert 20113210 requires minimal maintenance due to its self-adjusting packing gland. Periodic visual inspections should be performed based on operational severity.

Visual Inspection Checkpoints

Inspection Point	Observed Issue	Corrective Action
Media connectors (1)	Flange/clamp gasket leakage	Replace clamp gasket and re-tighten clamp band.
Relief bore (2)	Media leaking from weep hole on bonnet	Replace the packing gland pack or actuator assembly.
Swivel plate / seat (3)	Seat leakage through downstream line	Replace valve seat set / swivel plate assembly.

Troubleshooting Guide

Malfunction	Possible Cause	Corrective Measure
Actuator does not switch	Pilot air connected to wrong port	Connect pilot air to port 1 for CFA (normally closed).
	Pilot pressure insufficient	Verify pilot pressure is at least 4.8 bar(g) (up to 10 bar(g)).
	Operating line pressure too high	Reduce system operating pressure below 25 bar(g).
Valve seat leaks	Dirt trapped between seal and seat	Flush line; install upstream strainer (mesh < 1 mm).
	Valve seat seal worn or damaged	Disassemble actuator and install new swivel plate set.
	Reverse installation	Ensure pipeline flow matches direction arrow (flow below seat).
Leakage at relief bore	Spindle packing gland worn	Replace stem packing gland using installation tool (683221).

Decentralized Automation Modules (ELEMENT Systems)

Burkert Type 2100 can be combined with ELEMENT automation modules to form the pre-tested valve system Type 8801-YE. Compatible top-mounted units include:

• Type 8690: Pneumatic control unit with mechanical or inductive position limit switches.
• Type 8691: Control head with non-contact inductive sensor, colored high-performance LED status display, and digital interfaces (AS-Interface, IO-Link, büS).
• Type 8695 / 8697: Ultra-compact control head and position indicator optimized for integrated mounting on actuator sizes Ø 50 mm and Ø 70 mm.

Total Assembly Height with Automation Heads (DN 15, Actuator Ø 70 mm)

• Standard bare actuator height B / H: 182 mm / 178 mm
• Assembly height with Type 8690 / Type 8697: 232 mm
• Assembly height with Type 8691 / Type 8695: 256 mm