Y42 type steam pressure reducing valveMainly used for pipelines with steam as the medium, it plays a role in reducing pressure and stabilizing pressure.
This series of pressure reducing valves belongs to the piston type pressure reducing valve. It consists of two parts: the main valve and the 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, diaphragm, spring, regulating spring and other parts. By adjusting the spring pressure and setting the outlet pressure, the diaphragm is used to sense the change in outlet pressure. The opening and closing of the pilot valve drives the piston to adjust the size of the overcurrent area at the throttle position of the main valve, achieving the function of pressure reduction and stabilization.

Main technical parameters of Y42 pilot piston steam pressure reducing valve:

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 import pressure (Mpa)	1.6	2.5	4.0	6.4	10.0	16.0
Export 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 pressure difference (Mpa)	0.15	0.15	0.2	0.4	0.8	1.0
Leakage rate	GB12245-1989

Shell test does not include diaphragm and top cover

Y42 Pilot Piston Steam Pressure Reducing Valve ZeropartItem:

Part name	Part Material
Valve body, valve cover, bottom cover	WCB
Valve seat disc	2Cr13
LINER	2Cr13/25 (hard chrome plating)
piston	2Cr13/copper alloy
piston ring	alloy cast iron
Guide valve seat and guide valve stem	2Cr13
diaphragm	1Cr18Ni9Ti
Main valve spring	50CrVA
Main spring of pilot valve	50CrVA
Adjusting spring	60Si2Mn

Flow coefficient of Y432 pilot piston steam pressure reducing valve:

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

Y42 pilot piston steam pressure reducing valve size (PN1.6-4.0):

Nominal Diameter DN	Dimensions Unit: mm
	L		H	Hl
	6.4MPa	10.0/16.0MPa
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

Y42 pilot piston steam pressure reducing valve size (PN6.4-16.0):

Nominal Diameter DN	Dimensions Unit: mm
	L		H	Hl
	6.4MPa	10.0/16.0MPa
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

Ordering Notice: Please fill in the "Specification Sheet" or indicate the following content when placing an order:
1. Product model
2. Nominal pressure
3. Nominal diameter and rated flow coefficient Kv
4. Signal pressure and spring range
5. Traffic characteristics
6. Valve switching method
7. Working temperature range of the medium
8. Valve body and valve core materials
9. Is there an attachment? Please specify the attachment model
10. Are there any other special requirements