The BURKERT 20127383 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 PPS handwheel is available with a stainless steel diaphragm bonnet, ensuring reliable use in hygienic or aggressive ambient conditions. The flow-optimised tube valve body (VP) with minimum dead space enables high flow values and a wide range of possible applications. This specific model features a DN 50 clamp connection, an advanced PTFE with EPDM backing membrane, and a stainless steel tube body (316L/1.4435 BN2), suitable for pressures up to 10 bar and temperatures from -5 °C to 143 °C.

General Technical Data

Feature	Specification
Valve body material	Stainless Steel Tube 316L/1.4435 BN2
Diaphragm material	Advanced PTFE with EPDM backing membrane
Actuator material	PPS (Polyphenylene sulphide) handwheel
Port connection	DN 50 (NPS 2) Clamp (ASME BPE / BS4825-3)
Nominal pressure	0 - 10 bar (PN 10 / Class 150)
Medium temperature	-5 °C to +143 °C (steam sterilisation +150 °C for 60 min)
Ambient temperature	-10 °C to +130 °C (short-term up to +150 °C), autoclavable
Kv value (water)	46 m³/h

Approvals and Conformities

• FDA: The diaphragms comply with the Code of Federal Regulations published by the FDA (Food and Drug Administration, USA).
• USP: The diaphragms are tested according to United States Pharmacopeial Convention (USP) Class VI.
• EC Regulation 1935/2004: Suitable for use with food and beverages according to EC Regulation 1935/2004/EC.
• 3-A Sanitary Standards Inc.: The products comply with 3-A Sanitary Standards Inc (3-A SSI).

Material Specifications

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	Advanced PTFE/EPDM
6	Valve body	Stainless Steel Tube 316L/1.4435 BN2

Dimensions: Tube Valve Body (VP) with Clamp Connection

INFO

Dimensions in mm, unless otherwise stated. Further information on the drainage angle can be found in the supplementary instructions.

ASME BPE

Diaphragm size	Port connection Inch	∅D1	s	∅D2	L	h	H
40	2"	50.80	1.65	64.0	159	30.60	62.60

Performance Specifications

Maximum Permitted Medium Pressure

Diaphragm size	Maximum permitted medium pressure [bar] (PTFE/advanced PTFE)
40	10

Tightening Torques for the Screws

WARNING

Damage to the device when failing to observe tightening torque. Tighten each fastening screw in 3 stages (approx. 1/3, approx. 2/3, 3/3 of the tightening torque) crosswise.

Diaphragm size	Tightening torques [Nm] (VP Body, PTFE/advanced PTFE)
40	15