Differential pressure regulator PRD

The differential pressure regulator DNOVA RDT is a normally open regulator, the principle of which is based on balancing the force of elastic deformation of the spring and the force created by the pressure difference of the working medium in the diaphragm chambers of the drive. The RDT direct-acting differential pressure regulator is designed to automatically maintain the differential pressure in the regulated section of the pipeline (between the supply and return pipelines) in the heating, hot water, ventilation circuits in the heating substations of heat supply facilities. The installation of a differential pressure regulator in the ITP prevents water hammer, helps to reduce noise effects on the control valve and increase its service life.

Parameters of pressure regulators ‘differential pressure regulator’ DNOVA PRD1030E-F-DA DN15-150 PN16:

Regulator type	differential regulator
Type of execution	normally open
Nominal pressure, bar	16
Conditional flow capacity Kvs, m3 / h	0.16 - 280
Connection type	flanged
Body material	cast iron
Working environment temperature	From 5°C to +150°C
Ambient temperature	From -15°C to +50°C
Relative humidity	from 30 to 80%
Climate performance	U
Average product life	8 years

Technical characteristics of DNOVA PRD1030E-F-DA regulators DN15-150 PN16:

DN, mm	15	20	25	32	40	50	65	80	100	125	150
Conditional flow capacity Kvs, m3 / h	0.16 0.25 0.4 0.63 1.0 1.6 2.5 3.2 4.0	1.6 2.5 4.0 5.0 6.3	1.6 2.5 4.0 5.0 6.3 10.0	6.3 10.0 16.0	10 16 20 25	10 16 25 32 40	25 40 63	40 63 100	63 100 125	100 125 160	160 280
Regulation characteristics	Linear
Cavitation onset coefficient, Z	0.6			0.55		0.5		0.45	0.4	0.35	0.3
Leakage through a closed valve, %	0.05 Kvs

Setting ranges of pressure regulators "differential regulator" DNOVA PRD1030E-F-DA DN15-150 PN16:

Setting range number	Adjustment range of regulation	Pressure, MPa	Color of the spring of the setter
0	0.01 - 0.1	0.01	Grey
		0.04
		0.1
1	0.04 - 0.16	0.04	Yellow
		0.1
		0.16
2	0.1 - 0.4	0.1	Red
		0.16
		0.3
		0.4
3	0.3 - 0.7	0.3	Blue
		0.4
		0.5
		0.6
		0.7
4	0.6 - 1.2	0.6	Black
		0.7
		0.8
		0.9
		1.0
		1.1
		1.2

Sketch of dimensions of pressure regulators "differential regulator" DNOVA PRD1030E-F-DA DN15-150 PN16

Weight, dimensions and installation parameters of pressure regulators "differential regulator" DNOVA PRD1030E-F-DA DN15-150 PN16:

DN, mm	15	20	25	32	40	50	65	80	100	125	150
L, mm	130	150	160	180	200	230	290	310	350	400	480
H, mm	583	598	618	638	651	659	676	692	738	770	1109
H1, mm	535	545	560	568	576	576	583	592	628	645	966
Weight, kg	13.6	14.1	14.9	16.6	18.6	19.1	28.6	32	43.6	56.6	79.3

Mounting holes

DN, mm	15	20	25	32	40	50	65	80	100	125	150
Number of holes, pcs	4	4	4	4	4	4	4	4	8	8	8
Hole diameter ød, mm	12	12	12	16	16	16	16	16	16	16	16

Sketch of the composition of pressure regulators "differential regulator" DNOVA PRD1030E-F-DA DN15-150 PN16

Materials of pressure regulators "differential regulator" DNOVA PRD1030E-F-DA DN15-150 PN16:

No. on the diagram	Part name
Valve I	1	Frame	Grey cast iron SCH 20
	2	Saddle	Steel45, Steel St 20X13, Steel St 40X13
	3	Cover with the lower part of the membrane box	Steel 20
	4	Piston	Steel45, Steel St 20X13, Steel St 40X13
	5	screw
	6
	7	Guide
	8	Pad
	9	Block
Drive II	10	The lower part of the membrane box	Steel 20
	11	Upper part of the membrane box	Steel 20
	12	Nipple "+"
	13	Union "-"
	14	Pin
	15	screw	Steel20
	16	Washer
	17	Diaphragm piston	Steel 20
	18	Membrane	Steel 20
	19	Washer
	20	Rod seal (sealing element assembly)	Rubber-fluoroplastic
	21	Stock	Steel 40X13, 95X18
	22	Pad
Setter III	23	Pad
	24	Cap nut
	25	Pin
	26	Retaining ring
	27	Pipe
	28	Spring retainer	Steel 60S2A
	29	Top plate
	30	Bottom plate
	31	Connecting node
	32	Spring	Steel 60S2A
	33	Hook bushing
	34	Adjusting screw	Steel45
	35	Locking screw
	36	Plate
	37	screw
	38	Rack