DIFFERENTIAL PRESSURE REGULATOR RRC-2

FUNCTION

Pressure regulators are designed to maintain set-up, constant pressure difference in process installations, which are connected in series to regulator’s valve outlet. Regulators are adjusted to steam, liquids and infl ammable gases.

CONSTRUCTION

Regulator comprises three main units:a single-seated valve:
• valve (1) with pressure-balanced plug and stem with bellows seal,
• diaphragm actuator (2),
• control pressure adjuster (3).

CHARAKTERISTICS

• steel and stainless steel materials used
• maintenance-free bellows seal ensures high efficiency of the reducer
• high tightness of the shut-off due to the application of plugs with PTFE, EPDM and NBR sealings
• design reducing the noise level
Diaphragm actuator can have the following effective diaphragm area: 100 cm², 160 cm², 320 cm², depending on the pressure difference required. Actuator is connected to the valve through adjuster set (which consists of a spring /s/ with spring spacers).
Valve’s and actuator’s stems are sealed by means of elastic bellows made from stainless steel. The bellows do not require service during operation. Regulator’s valve is closed on power failure.

PRINCIPLE OF OPERATION

• higher pressure impulse (P”+“) is applied to actuator chamber through adjuster set,
• lower pressure impulse (P”-“) is applied to actuator outer chamber.
The spring tension should be such as to allow for equilibrium of forces, when pressure difference achieves its set-up value. If the set-up value is exceeded, equilibrium of forces gets disturb, which causes valve plug to open and fl ow rate through the valve to increase till the regulated pressure drops down to its set-up value..

NOTE:

1. In order to avoid excess noise, it is recommended to maintain pr (abs) > ½ p zas (abs).
2. Kvs values of regulators are selected by the manufacturer according to individual needs of Customer.
3. Please advise regulated pressure of the regulator while ordering, and the regulator will be set accordingly.3. Please advise regulated pressure of the regulator while ordering, and the regulator will be set accordingly.

Technical data