BURKERT 20117041 Type 2921 is a manually operated 2/2-way globe valve consisting of a manual actuator and a 2-way body made of stainless steel. With a high-quality valve body, the manually operated valve offers diverse usage options to shut off both neutral and aggressive gaseous and liquid media. The tried-and-tested self-adjusting packing gland guarantees optimal tightness and enables low-maintenance operation, even at high switching cycles. Depending on the application, the soft PTFE or PEEK seal ensures a reliable valve seat seal under challenging operating conditions. The actuator is made of high-quality plastic (PPS) suitable for demanding environments, possesses a visual position indicator, and can be optionally equipped with stroke limitation and locking.

Approvals and Conformities

In accordance with the Declaration of Conformity, the product is compliant with the EU Directives, including the Pressure Equipment Directive 2014/68/EU.

Explosion Protection (Optional) As a category 2 device suitable for zone 1/21 and zone 2/22 (valid for the variable code PX51).

• ATEX: EPS 18 ATEX 2 008 XII 2G Ex h IIC T4...T2 Gb / II 2D Ex h IIIC T135 °C...T300 °C Db
• IECEx: IECEx EPS 18.0007X Ex h IIC T4...T2 Gb / Ex h IIIC T135 °C...T300 °C Db

Drinking Water Suitable for use in drinking water applications. The materials comply with the assessment principles (UBA) for materials in contact with drinking water (TrinkwasserV). Stainless steel body PF39 is suitable for products with medium temperature up to 85 °C (hot water).

Foods and Beverages / Hygiene

• FDA: All wetted materials are compliant with the Code of Federal Regulations published by the FDA (valid for variable code PL02, PL03).
• USP: All wetted materials are biocompatible according to the United States Pharmacopeial Convention (valid for variable code PL04).
• EC Regulation 1935/2004: All wetted materials are compliant with EC Regulation 1935/2004/EC (valid for variable code PL01, PL02).
• China GB Standards: All wetted materials are compliant with the requirement of China food GB Standards (valid for variable code PL10).

Materials

No.	Element	Material
1	Cover	Polyamide (PA)
2	Screw	Stainless steel 1.4301
3	Locking device	Stainless steel 1.4305
4	Handwheel	Polyphenylene sulphide (PPS)
5	Visual position indicator with scale	Polyamide (PA)
6	Packing gland	PTFE V-rings (filled), with spring compensation
7	Spindle	Stainless steel 1.4401 (316)/1.4404 (316L)
8	Spindle guide	DN 15...DN 50: PEEK DN 65...DN 100: Stainless steel 1.4401 (316)/1.4404 (316L)
9	Housing seal	Graphite
10	Swivel plate	Stainless steel 1.4401 (316)/1.4404 (316L)
11	Seat seal	PTFE or PEEK
12	Valve seat with O-ring	Stainless steel 1.4571, EPDM
13	Valve body	Stainless steel 316L/CF3M

Dimensions

Actuator

Nominal connection size (pipe) [DN]	[NPS]	Handwheel diameter ∅ [mm]	H1	H2 (locking)
15	1/2	45 (S)	217	224
20	3/4	45 (S)	224	230
25	1	45 (S)	228	234
32	1 1/4	45 (S)	296	303
40	1 1/2	45 (S) (at <16 bar), 110 (M)	301	307
50	2	110 (M)	307	313
65	2 1/2	160 (L)	361	368
80	3	160 (L)	369	375
100	4	160 (L)	379	385

Body with Flange Connection

DN	∅ DF	LF	∅ BF	AF	∅ D	A x α	∅ MF
15	95	130	65	16	14	4 x 90°	18.1
20	105	150	75	18	14	4 x 90°	23.7
25	115	160	85	18	14	4 x 90°	29.7
32	140	180	100	18	18	4 x 90°	38.4
40	150	200	110	18	18	4 x 90°	44.3
50	165	230	125	20	18	4 x 90°	56.3
65	185	290	145	22	18	8 x 45°	66.0
80	200	310	160	24	18	8 x 45°	81.0
100	235	350	190	24	22	8 x 45°	100.0

(Table shows DIN EN 1092 PN 25 FTF 1 according to DIN EN 558-1)

Body with Threaded Connection

Body with Welded Connection

Body with Clamp Connection

Installation and Operation

Flow Direction

The valve seat is always closed against the medium flow. The flow direction should therefore be set such that the valve reaches the flow beneath the valve seat.

Position Indicator

When turning the handwheel anticlockwise, the reproducible stroke scale becomes visible between the position indicator and the handwheel.

INFO

The visibility of the stroke scale is not directly correlated with the closed position of the valve. Depending on the valve design, the repeatable stroke scale may not be visible when the valve is open, or be visible when the valve is closed.

Set Stroke Limit (Optional)

Setting the minimum and maximum stroke limit is possible as an option. An adjusting sleeve is used for this purpose.

Lock Handwheel (Optional)

It is also an option to lock the handwheel to prevent unintentional or unauthorised operation of the valve. The locking pin has a bore (Ø 3.8) and can be secured against unauthorised use with a padlock.

Safety Instructions

DANGER

Risk of injury due to high pressure and escaping medium Switch off the pressure before working on the device or system. Vent or drain the lines.

WARNING

Risk of crushing by mechanically powered parts The upwards and downwards movement of the device means there is a risk of crushing. Do not reach into the openings of the valve body.

DANGER

Explosion hazard due to electrostatic charge! (For ATEX/IECEx versions) If there is a sudden discharge from electrostatically charged devices or individuals, there is a risk of explosion in the potentially explosive area.

• Take appropriate measures to ensure that no electrostatic charges can build up in the potentially explosive area.
• Only clean the device surface by wiping it gently with a damp or antistatic cloth.
• Earth the actuator and the valve body.
• If a plastic body is used, earth the actuator separately.