Carbon Steel Pressure Reducing Valve, A216 WCB, DN15-DN500

Jul 03, 2025

Product Name: Carbon Steel Pressure Reducing Valve
Material: Cast Carbon Steel ASTM A216 WCB
Size Range: DN15-DN500, 1/2-20 Inch
Pressure Range: PN16-PN160, Class 150-900 LB
Flow Direction: Unidirectional
End Connection: Flanged
Applicable Medium: Water, Oil, etc.

This series of pressure reducing valves are of the pilot-operated, poppet type. They are composed of a main valve and a pilot valve. The main valve mainly consists of a valve seat, main valve disc, piston, and spring components. The pilot valve mainly consists of a valve seat, valve disc, diaphragm, spring, and adjusting spring components. By adjusting the spring pressure to set the outlet pressure, and using the diaphragm to sense changes in outlet pressure, the pilot valve opens and closes to drive the piston to adjust the flow area of the main valve, thus achieving the function of pressure reduction and stabilization. The main product is primarily used in steam pipelines to provide pressure reduction and stabilization.

Main Technical Parameters and Performance Indicators

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
Seal 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 Differential Tolerance (Mpa) ≥ P2P	GB12246-1989
Flow Rate Tolerance (Mpa) P2G	GB12246-1989
Minimum Pressure Differential (Mpa)	0.15	0.15	0.2	0.4	0.8	1.0
Leakage Rate	GB12245-1989

Main Components and Materials

Component Name	Component Material
Valve Body, Cover, Base	ASTM A216 WCB
Valve Disc	2Cr13
Piston	2Cr13/25 (Stainless Steel)
Piston Ring	Alloy Cast Iron
Guide Valve, Guide Rod	2Cr13
Diaphragm	1Cr18Ni9Ti
Main Valve Spring	50CrVA
Pilot Valve Spring	50CrVA
Regulating Spring	60Si2Mn

Dimensions (PN1.6-4.0)

Nominal Diameter DN (mm)	L (1.6/2.5MPa)	L (4.0MPa)	H (mm)	HI (mm)
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 (mm)	L (6.4MPa)	L (10.0/16.0MPa)	H (mm)	HI (mm)
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