BURKERT Type 2933 manually operated diaphragm valve consists of a manually operated actuator, a diaphragm, and a 2-way valve body. The manual actuator with a plastic or stainless steel handwheel is available with a diaphragm bonnet made of stainless steel or plastic and ensures use in hygienic or aggressive ambient conditions. The flow-optimized valve body with minimum dead space enables high flow values and a wide range of possible applications. The valve body and the diaphragms are available in all common materials and variants. The actuator has a compact, autoclavable design and is compatible with all other Bürkert diaphragm valves. An explosion-proof ATEX/IECEx device variant is available. The manual actuator is equipped with an integrated visual position indicator, a reproducible stroke scale, and an adjustable closing limiter.

General Technical Data

Product properties
Forged steel valve body (VS)	Forged stainless steel 1.4435 in accordance with BN2 DIN EN 10222-5, F316L in accordance with ASTM A182/A182M and 316L in accordance with ASME BPE
Tube valve body (VP)	Stainless steel tube 1.4435-BN2 / UNS S31603 (316L) according to DIN 11866, ASTM A269 / A270, DIN EN 10217-7 / 10216-5
Cast valve body (VG)	Stainless steel precision casting 1.4435 / 316L
Plastic valve body (PW, PV, PP, PD)	PVC-C, PVC-U, PP, PVDF
Diaphragm	EPDM (AD), PTFE/EPDM (EA), advanced PTFE/EPDM (EU), laminate of GYLON® and EPDM (ER)
Actuator	Stainless steel/PPS, PPS/PPS, stainless steel/stainless steel
Diaphragm size	8...100
Standard surface quality (VS)	Internally electrically polished: Ra ≤ 0.38 μm (ASME BPE SF4 / DIN HE4) Internally mechanically polished: Ra ≤ 0.5 μm (ASME BPE SF1)
Operating medium	Neutral gases and liquids, highly purified, sterile, aggressive or abrasive mediums
Medium temperature (EPDM)	-10...+143 °C (steam sterilisation +150 °C for 60 min)
Nominal diameter	DN 06...DN 100 (1/8"...4")
Ambient temperature	-10...+130 °C (short-term up to +150 °C), autoclavable

Approvals and Conformities

• Explosion protection: ATEX / IECEx (Category 2 device suitable for zone 1/21 and zone 2/22). II 2G Ex h IIC T4...T2 Gb / II 2D Ex h IIIC T135 °C...T300 °C Db.
• 3-A Sanitary Standards Inc.: The products comply with 3-A Sanitary Standards Inc (3-A SSI) as per certificate.
• FDA: The diaphragms made of EPDM, PTFE/EPDM, advanced PTFE/EPDM, and laminate of GYLON® and EPDM comply with the Code of Federal Regulations published by the FDA.
• USP: The diaphragms are tested according to USP Class VI.
• EC Regulation 1935/2004: Suitable for use with food and beverages.
• TA Luft: Technical instruction on air quality control.

Materials

Note

Your product variant may differ from this illustration depending on the body and interface options.

No.	Element	Material
1	Handwheel	Polyphenylene sulphide (PPS), stainless steel 1.4308
2	Visual position indicator	Polyamide (PA), Stainless steel 1.4305
3	Valve spindle	Stainless steel 1.4305
4	Diaphragm bonnet	Stainless steel 1.4308, polyphenylene sulphide (PPS)
5	Diaphragm	EPDM (AD), PTFE/EPDM (EA), advanced PTFE/EPDM (EU), laminate of GYLON® and EPDM (ER)
6	Valve body	Forged steel, tube, cast, or plastic

Dimensions

Manual Actuator (Diaphragm Size 8...25)

Position open	Position closed

Diaphragm size	H1	H2	∅ B
8	54	49	35
15	84	78	45
20	95	86	45
25	101	90	45

Forged Steel Valve Body (VS) with Welded Connection

DIN EN ISO 1127 / ISO 4200 / DIN 11866 series B

Diaphragm size	Port connection DN	∅D1	s	L	h	H	Product key
8	8	13.5	1.6	90	9.3	18.8	SA40
15	8	13.5	1.6	108	8.15	19.85	SA40
8	10	17.2	1.6	90	9.3	18.8	SA41
15	10	17.2	1.6	110	12.05	23.75	SA41
15	15	21.3	1.6	110	12.05	23.75	SA42
20	15	21.3	1.6	119	16.0	30.3	SA42
20	20	26.9	1.6	119	16.0	30.3	SA43
25	20	26.9	1.6	119	19.0	37	SA43
25	25	33.7	2.0	129	19.0	37	SA44
40	25	33.7	2.0	161	27.6	52.4	SA44
40	32	42.4	2.0	161	27.6	52.4	SA45
40	40	48.3	2.0	161	27.6	52.4	SA46
50	50	60.3	2.0	192	35.5	68.3	SA47
80	65	76.1	2.0	250	51.0	98.1	SA48
80	80	88.9	2.3	250	51.0	98.1	SA49
100	100	114.3	2.3	295	63.5	127.0	SA39

Performance Specifications

Flow Characteristics (Forged Steel Valve Body VS)

Diaphragm size	Port connection DN	Kv value water [m³/h] (DIN EN ISO 1127)
8	8	1.5
15	15	6.5
20	20	12.5
25	25	18
40	40	41
50	50	66
65	65	110
80	80	160
100	100	235

Maximum Permitted Medium Pressure

Diaphragm size	Maximum permitted medium pressure [bar] (EPDM/FKM)	Maximum permitted medium pressure [bar] (PTFE/advanced PTFE/GYLON®)
8...40	10	10
50	7 / 10	7 / 10
65...80	10	10
100	6	6

Tightening Torques

Caution

The following tightening torques refer to the static media pressures specified above. Excessive torque can shorten the service life of the diaphragm. A tolerance of +10% applies to the tightening torques specified.

Diaphragm size	Medium pressure [bar]	Static Tightening torque [Nm] (EPDM/FKM)	Static Tightening torque [Nm] (PTFE)
8	10	0.6	1.1
15	10	0.8	1.7
20	10	0.9	3
25	10	1.2	3.5
32	10	2.5	4
40	10	4.5	7
50	10	6.0	11
65	10	8.0	23
80	10	12.0	21
100	6	11.0	22

Installation and Safety

Danger

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

Warning

Risk of injury due to improper installation. Installation may be carried out by authorised technicians only and with the appropriate tools. Observe tightening torques.

Installation position: Any, preferably actuator facing up. It is the responsibility of the installer and the operator to ensure self-draining. The self-draining angle (α) depends on the valve body size and the inner diameter of the port connection (DN). The marking on the port connection of the valve body serves as an orientation aid and must point upwards.