Self-acting pressure reducing valves - RCRB, RCRBm

Self-acting pressure reducing valves type RCRB are designed to control set-up pressure in installations, which are connected with the pressure downstream of the valve. Application of this regulator is heating, industrial and power installations. Self-acting pressure reducing valves are suitable for steam, non inflammable vapors and gases and neutral liquids. Adjust range of set pressure is depending on the actuator: 0,2-1,6 ; 1-2,8 ; 1- 3,5 or 2,5-7 bar. The regulators are capable of operating in temperature range from 0 to +180°C (with condensation chamber, if necessary).

• Installation on the supply or return of system.
• Excellent control of the process over high differential pressures.
• High quality of regulation.
• Does not require conservation.
• requiring no external power source.

Construction:

For ensuring stable regulation at high differential pressures, the valve-plug (3) is balanced (4). The regulator consisting of two units:
- executing unit (valve): valve body (1), valve-seat (2), valve-plug (3), balanced unit (4), valve-stem (5);
- self-acting unit (actuator): impulse pipe (6), actuator discs and diaphragm (8), springs (9), actuator-stem (10), adjusting nut (11), actuator-body(12).

Principle of operation:

Medium flows to valve chamber (A). Control signal higher pressure pass through the impulse pipe (7) to the actuator chamber (B). The actuator chamber (C) is connected with atmosphere. Size of the gap between the valve-seat (2) and the valve-plug (3) is depending on constant difference pressure between chamber B and C. When downstream pressure overcomes the adjusted set point, the valve closes proportionally to the changes in pressure. Pressure set point value is setting by adjustment nut (11). Normally the valve-plug (3) is open.

Installation:

Install the regulator with the actuator suspended downwards. For ensuring good work the regulator should be protect by the filter or the magnetic strainer. Install pipelines horizontally. The direction of medium flow have to correspond with the arrow on the valve body.

Technical data:

Series		RCRB (flanged)
Diameter DN		15	20	25	32	40	50
Flow factor Kvs		3,2	5	8	12,5	20	32
Pressure PN		25 bar
Adjust range	Dm=240	-			0,2-1,6; 1-2,8 bar
	Dm=160	0,2-1,6; 1-3,5 bar			-
		2,5-7 bar
Max. pressure diference		12 bar
Max. temprature		180°C
Max. pressure in the actuator chamber		20 bar

Flanged connectors PN25, PN ISO 7005-1

series	RCRBm (screwed)
Diameter DN	15	20	25
Flow factor Kvs	3,2	4,5	6,3
Pressure PN	16 bar
Adjust range Dm=160	0,2-1,6; 1-3,5; 2,5-7 bar
Max. pressure diference	12 bar
Max. temprature	150°C
Max. pressure in the actuator chamber	16 bar

Dimensions [mm]:

Pressure reducing valves RCRB flanged	Pressure reducing valves RCRBm screwed

DN	15	20	25	32	40	50
H1	47,5	52,5	57,5	70	75	82,5
H2	28	31	33	-	-	-
H1max	336	344	347	360	362	384
H2max	318	344	333	-	-	-
L1	130	150	160	180	200	230
L2	75	80	85	-	-	-

Values range

Indicate value range	16	35	70	16	28
Adjust range Δ p [bar]	0,2...1,6	1...3,5	2,5...7	0,2...1,6	1...2,8
Actuator series	Dm=160			Dm=240