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Spring piston pressure reducing valve

Product overview

This series of pressure reducing valve belongs to the pilot piston type pressure reducing valve. It consists of main valve and pilot valve. The main valve is mainly composed of valve seat, main valve disc, piston, cylinder liner, spring and other parts. The pilot valve is mainly composed of valve seat, valve disc, diaphragm, spring, adjusting spring and other parts. The outlet pressure is set by adjusting the spring pressure, the diaphragm is used to sense the change of the outlet pressure, and the pilot valve is opened and closed to drive the piston to adjust the size of the flow area of the throttling part of the main valve, so as to realize the function of decompression and voltage regulation.

Product details

Product overview

Main technical parameters and performance

Nominal pressure (Mpa)	1.6	2.5	4.0	6.4	10.0	16.0
Shell test pressure (Mpa)*	2.4	3.75	6.0	9.6	15.0	24
Sealing test pressure (Mpa)	1.6	2.5	4.0	6.4	10.0	16.0
Maximum inlet pressure (Mpa)	1.6	2.5	4.0	6.4	10.0	16.0
Outlet pressure range (Mpa)	0.1-1.0	0.1-1.6	0.1-2.5	0.5-3.5	0.5-3.5	0.5-4.5
Pressure characteristic deviation (Mpa)△P2P	GB12246-1989
Flow characteristic deviation (Mpa) P2G	GB12246-1989
Minimum differential pressure (Mpa)	0.15	0.15	0.2	0.4	0.8	1.0
Leakage	GB12245-1989

*: Shell test does not include diaphragm, top cover

Flow Coefficient (Cv)

DN	15	20	25	32	40	50	65	80	100	125	150	200	250	300	350	400	500
Cv	1	2.5	4	6.5	9	16	25	36	64	100	140	250	400	570	780	1020	1500

Dimensions

Nominal diameter DN	Dimensions
	L		H	Hl
	1.6/2.5MPa	4.0MPa	H	Hl
15	160	180	295	90
20	160	180	330	98
25	180	200	330	110
32	200	220	330	110
40	220	240	345	125
50	250	270	345	125
65	280	300	350	130
80	310	330	385	160
100	350	380	385	170
125	400	450	400	200
150	450	500	415	210
200	500	550	475	240
250	650		525	290
300	800		580	335
350	850		620	375
400	900		660	405
450	900		730	455
500	950		750	465

Dimensions (PN6.4-16.0)

Nominal diameter DN	Dimensions
	L		H	Hl
	6.4MPa	10.0/16.0MPa	H	Hl
15	180	180	305	105
20	180	200	340	105
25	200	220	340	120
32	220	230	340	120
40	240	240	355	135
50	270	300	355	135
65	300	340	360	140
80	330	360	395	17
100	380		400	185
125	450		415	215
150	500		430	225
200	550		495	260
250	650		545	310
300	800		600	355
350	850		640	395
400	900		690	435
500	950		780	495

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