Self-acting flow regulator valve - RQB, RQBm

Self-acting flow regulator valve type RQB controls set-up medium flow. Flow regulator valve type RQB is designed for water, non inflammable vapors and gases and neutral liquids. Application of this regulator is heating, industrial and power installations. The pressure regulators are capable of operating within temperatures ranging from 0 to +150°C

Description:

• 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 (4) is balanced (5). The regulator consisting of two connected components:
- a valve: valve-body (1), flow limiter(2), valve-seat (3), valve-plug (4), balanced unit (5), valve-stem (6);
- an actuator: impulse pipe (7), actuator-discs and diaphgram(8), spring (9), actuator-stem (10), adjusting nut (11), actuator case (12).

Principle of operation:

Medium flows to valve chamber (A). The flow limiter (2) determined size of the gap between chamber A and B. The control signal pass through the impulse pipe (7) from the chamber (A) to the actuator chamber (C). The value of the pressure goes by the hole in valve-plug (4) from chamber (B) to the chamber (D). The value ΔP depends on the spring tension(9). The constant difference of the pressure beetwen the chambers (C) and (D), depends on constant pressure drop ΔPm beetwen the chambers (A) and (B). The flow value is adjustable at flow limiter (2).

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 (flanged)			RQB
Diameter DN			15	20	25	32	40	50
Flow factor Kvs			3,2	5	8	12,5	20	32
Pressure PN			25 bar
Water flow m3/h for pressure drop	0,2	Qmin	0,15	0,2	0,4	0,6	1,0	1,6
		Qmax	1,3	2,0	3,2	5,0	8,0	13
	0,5	Qmin	0,3	0,5	0,8	1,2	2,0	3,0
		Qmax	2,3	3,5	5,6	8,8	14	23
Adjust range	Dm=240		-			0,2 lub 0,5 bar
	Dm=160		0,2 lub 0,5 bar			-
Max. pressure diference			12 bar
Max. temprature			180 ° C
Max. pressure in the actuator chamber			25 bar

Flanged connectors PN25, PN ISO 7005-1

series			RCQoBm (srewed)
Diameter DN			15	20	25
Flow factor Kvs			3,2	4,5	6,3
Pressure PN			16 bar
Water flow m3/h for pressure drop	0,2	Qmin	0,15	0,2	0,3
		Qmax	1,3	1,8	2,6
	0,5	Qmin	0,3	0,4	0,6
		Qmax	2,3	3,2	4,5
Adjust range Dm=160			0,2 lub 05 bar
Max. pressure diference			12 bar
Max. temprature			150 ° C
Max. pressure in the actuator chamber			bar

Dimensions [mm]:

Flow regulator RQB	Flow regulator screwed RQBm

DN	15	20	25	32	40	50
H1	76,5	82,5	82,5	94	102	110
H2	63	66	66	-	-	-
H1max	215	223	226	246	248	270
H2max	172	177	177	-	-	-
L1	130	150	160	180	200	230
L2	75	80	85	-	-	-

Value range

Indicate value range	20	50	20	50
Adjust range D p [bar]	0,2	0,5	0,2	0,5
Actuator series	Dm=160		Dm=240