BURKERT 20099713 (Type 2101) is a pneumatically operated 2/2-way globe valve from the ELEMENT series designed for decentralized process automation. Built with an investment cast 316L stainless steel body and 1" ANSI B16.5 Class 150 raised-face flanges, this configuration integrates an actuator size Ø 50 mm (code D) molded from polyphenylene sulphide (PPS). The valve operates with Control Function A (normally closed by internal spring force) and is specifically engineered with flow direction above the seat for shut-off control of gaseous media and steam.

Certified under ATEX and IECEx conformity standards, this specific article is supplied as an oxygen variant cleaned and degreased of all oil and grease according to Burkert specification DIS 1000020797. The stem seal features a self-adjusting PTFE V-ring packing gland with spring compensation, providing maintenance-free spindle sealing and extended operating lifecycles under CIP/SIP conditions.

Structural Layout and Working Principle

Type 2101 combines a pneumatic piston actuator with an integrated internal air routing system and a 2-way globe valve body. The piston drives a 1.4401/1.4404 stainless steel spindle coupled to a swivel plate with an embedded PTFE seal ring, which seals against a replaceable screwed-in stainless steel seat.

Material Specifications

Item No.	Component	Material
1	Ground terminal	Stainless steel 1.4301 / 1.4305 (ATEX execution)
2	Optical position indicator	Polysulfone (PSU)
3	Pilot air ports	Push-in connector PP (standard Ø 6 mm)
4	Actuator cover	Polyphenylene sulphide (PPS)
5	Actuator casing	Stainless steel 1.4561 (316Ti)
6	Piston seal	FKM
7	Spring assembly	Stainless steel 1.4310
8	Spindle tube	Stainless steel 1.4401 (316) / 1.4404 (316L)
9	Spindle packing	PTFE V-rings (filled), spring-compensated
10	Spindle	Stainless steel 1.4401 (316) / 1.4404 (316L)
11	Spindle guide	PEEK (DN 15 to DN 65)
12	Body seal	Graphite, PTFE (option)
13	Swivel plate	Stainless steel 1.4401 (316) / 1.4404 (316L)
14	Seat seal	PTFE
15	Valve seat with O-ring	Stainless steel 1.4571 with EPDM O-ring
16	Valve body	Investment cast stainless steel 316L / CF3M

Control Function and Media Restriction

Burkert article 20099713 utilizes Control Function A with medium entry located above the seat orifice. Medium pressure assists the spring pack in maintaining tight closure across the seat seal.

Media Restriction: Gases and Steam Only

Valves with the flow direction above the seat must not be used for liquid media. In liquid service, closing against line momentum induces water hammer capable of rupturing pipelines and causing catastrophic actuator or body damage.

Opening the valve requires pilot air pressure applied to actuator port 1 to overcome both spring pre-tension and process line pressure acting over the surface of the swivel plate.

Technical and Fluidic Performance

Technical Parameter	Value
Nominal Diameter (DN / Seat Size)	DN 25 (25 mm, NPS 1")
Port Connection Standard	ANSI B16.5 Class 150 (FTF 37 acc. to DIN EN 558-2)
Flow Coefficient (Kv water)	13 m³/h (measured at +20 °C, 1 bar Δp)
Operating Pressure Range	0 bar(g) to 16 bar(g)
Permissible Pilot Air Pressure	2.7 bar(g) to 10 bar(g)
Medium Temperature Limit	0 °C to +60 °C (oxygen service)
Ambient Temperature Limit	-10 °C to +60 °C (push-in fitting limit)
Maximum Fluid Viscosity	600 mm²/s
External Seat Leakage	Leakage rate A acc. to DIN EN 12266-1 (air test)
Protection Rating	IP65 / IP67 according to IEC 529 / EN 60529

Minimum Required Pilot Pressure

For actuator size Ø 50 mm (D) with flow above the seat on DN 25 ports, the pilot supply pressure must be scaled according to line operating pressure to ensure full stroke opening:

• At 0 bar(g) operating line pressure: minimum 2.7 bar(g) pilot pressure.
• At 10 bar(g) operating line pressure: minimum 4.2 bar(g) pilot pressure.
• At 16 bar(g) maximum operating line pressure: minimum 5.2 bar(g) pilot pressure.

Dimensions

Actuator Dimensions (Ø 50 mm / Code D)

• Actuator Outer Diameter (Ø A): 64.5 mm
• Total Height (H): 245 mm
• Total Height with Control Head Type 8695: 339 mm
• Total Height with Position Feedback Type 8697: 325 mm

Flange Dimensions (ANSI B16.5 Class 150 / 1 NPS)

• Outer Flange Diameter (Ø DF): 108 mm
• Face-to-Face Body Length (LF): 184 mm
• Pitch Circle Diameter (Ø BF): 79.2 mm
• Flange Thickness (AF): 14.2 mm
• Bolt Hole Diameter (Ø D): 15.7 mm
• Bolt Hole Pattern (A × α): 4 × 90°
• Inner Port Diameter (Ø MF): 26.7 mm

Explosion Protection and ATEX/IECEx Operation

Article 20099713 complies with certification codes EPS 18 ATEX 2 008 X and IECEx EPS 18.0007X (mechanical safety Ex h):

• II 2G Ex h IIC T4…T2 Gb
• II 2D Ex h IIIC T135°C…T300°C Db

Electrostatic Discharge and Earthing in Explosive Zones

Risk of explosion from electrostatic charge accumulation. Conductive connection between the valve body and pipework must be established. The stainless steel grounding terminal on the actuator must be connected to local plant equipotential bonding. Only wipe housing exteriors with a damp or anti-static cloth. Do not use dry rags.

Temperature Class Limits for Hazardous Areas

Temperature Class	T4	T3	T2
Maximum Permitted Surface Temperature	+135 °C	+200 °C	+300 °C
Permissible Ambient Temperature Range	-40 °C to +100 °C	-40 °C to +130 °C	-40 °C to +130 °C
Maximum Process Medium Temperature	+125 °C	+185 °C	+285 °C

Process limits are further bounded by the oxygen execution limit of +60 °C.

Installation and Mechanical Mounting

• Ensure pipeline faces are squarely aligned before bolting flange joints.
• Clean pipeline interiors of welding slag, metal chips, and particulate before installing the assembly.
• Mount the valve in any spatial orientation, preferably with the actuator upright.

360° Actuator Orientation

The pneumatic actuator casing can be freely rotated 360° relative to the body to simplify pilot air line routing. When rotating the actuator, pressurize pilot air port 1 to 5 bar to lift the swivel plate off the seat, preventing mechanical damage to the PTFE sealing lip. Rotate counterclockwise (viewed from below) using an open-end wrench.

Fastening Torques

Interface	Size / Spindle	Tightening Torque
Valve Body to Actuator Connection	DN 25	60 ± 3 Nm
Screwed-in Valve Seat	DN 25 (tool 652 606)	40 ± 5 Nm
Spindle Guide Bushing	Spindle Ø 10 mm	6 Nm

Maintenance and Replacement Parts

Under normal industrial operating conditions, the actuator requires no servicing. The swivel plate assembly, valve seat, and spindle packing gland are wearing parts that can be overhauled in the field using original Burkert service kits.

Recommended Service Kits for DN 25 (Actuator Ø 50 mm)

• Valve Set (Swivel plate with PTFE seal, pin, and body gasket): Order No. 160 737
• Packing Gland Seal Set (PTFE V-rings, spring, guides, gasket, grease): Order No. 216 433
• Valve Seat Replacement Set (Seat ring, seal, O-ring): Order No. 262 170
• Dedicated Valve Seat Installation Tool: Order No. 652 606
• Modified Socket Wrench (10 mm Spindle / AF 19): Order No. 683 221

Actuator Disassembly Hazard

The PPS actuator housing houses a heavy compression spring under mechanical pre-tension. Do not attempt to open the actuator housing; dismantling the casing will cause explosive ejection of internal springs and serious personal injury.