The Kytola 2851 constant-flow regulator is a diaphragm-operated differential-pressure controller, also known as a self-operated regulating valve or constant-flow valve. It automatically maintains the required gas or liquid flow when pressure changes—for example, low liquid flows with varying supply and back pressures, or gas flows with varying back pressure.

Model 2851 has a simple design and is easy to install and maintain.

Model 2851 is commonly used with the Kytola model L variable-area flow meter.

Typical applications: seal-water control, flush-water control, water purging and air purging.

Technical specifications.
Maximum flow.	3.0 L/min water (100 NL/min air at 6 barg).
Nominal flow rate	2.3 L/min water (100 NL/min air at 6 barg).
Maximum differential pressure.	20 bar
Maximum static pressure.	20 bar (30 bar / 30°C)
Pressure drop at nominal flow.	2 bar
Maximum temperature.	75°C acrylic (*80°C Grilamid).
Housing	AISI 316 stainless steel.
Spring	AISI 316 stainless steel.
Diaphragm	EPDM
Diaphragm plate	AISI 316 stainless steel.
Seal	Nitrile (*Viton®, EPDM)
Mesh opening	PTFE
Connection	G 1/4″ or NPT 1/4″.
Weight	0,85 kg
Installation orientation.	Vertical installation.
*) Customized on request.