BURKERT 772179 (Type 2651) is a 2/2-way stainless steel ball valve designed to shut off and distribute medium flows in a wide range of industrial applications. This model features a DN 65 flanged connection (ANSI 150) and is equipped with a mechanical interface according to ISO 5211, allowing for easy installation of pneumatic or electric rotary actuators. It is particularly suitable for application conditions with high thermal loads and aggressive media, offering high flow rates, high medium pressure tolerance, and a long service life.

Technical Data

Property	Value
Valve Function	2/2-way
Port Connection	Flange, ANSI B16.5
Nominal Diameter	DN 65
Body Material	Stainless steel 1.4408 (A351 - CF8M)
Ball Material	Stainless steel 1.4401 (A182 - 316)
Seal Material	PTFE (Polytetrafluorethylene)
Medium Temperature	-10 °C to +200 °C
Breakaway Torque	83 N m
Running Torque	69 N m
Actuator Interface	According to EN ISO 5211

Pressure and Temperature Limits

The temperature limit values of the actuators are usually lower. Therefore, the lowest temperature limit values of included system components (ball valve and actuator) must be observed.

Installation

DANGER!

Risk of injury from high pressure in the equipment. There is a serious risk of injury when reaching into the equipment. ▶ Turn off the pressure and release the pressure in the pipes before loosening pipes and valves.

WARNING!

Risk of injury due to improper installation. Improper installation may result in injuries as well as damage to the device and the area around it. ▶ This work may be carried out by authorised technicians only and with the appropriate tools. ▶ Take appropriate measures to prevent the equipment from being unintentionally activated.

Tightening Torques

When installing the flanged ball valve, ensure the seals are seated correctly. Refer to the following table for the tightening torques of the installation bolts and end caps for Type 2651 flanged valves:

Size	Tightening torque of installation bolts (Flange) [Nm]	Tightening torque of end caps [Nm]
DN15 (1/2")	19.6	214.3
DN20 (3/4")	19.6	265.3
DN25 (1")	39.2	336.7
DN32 (1 1/4")	39.2	428.6
DN40 (1 1/2")	65.7	530.6
DN50 (2")	65.7	714.4
DN65 (2 1/2")	65.7	785.7
DN80 (3")	86.2	867.3
DN100 (4")	86.2	-

Maintenance

The ball valves are maintenance-friendly when operated according to the instructions.

DANGER!

Risk of injury from high pressure in the system. Acute risk of injury when intervening in the system. ▶ Always switch off the pressure and bleed the lines before undoing the lines and valves!