Water pressure relief valve

Function and use

Adjust and control the outlet pressure of the main valve. The outlet pressure of the main valve will not change its outlet pressure due to the change of the inlet pressure. It can be used for domestic water supply, fire protection systems and industrial water supply systems.

Pressure Rating: PN10, PN16, PN25

Diaphragm type: DN20~450

Piston type: DN500~750

Piston type: 0~80oC

Nominal diameter DN(mm) Size (mm)
L W H
20 150 245 195
25 160 254 208
32 180 263 222
40 200 272 237
50 203 282 254
65 216 292 272
80 241 310 282
100 292 330 303
125 330 358 344
150 356 385 385
200 495 438 437
250 622 490 532
300 698 550 600
350 787 617 677
400 914 693 764
450 978 778 862
500 978 873 972
600 1230 980 1096

Burnished Honed of seamless steel pipe

Product Description
Hydraulic Cylinder Honed Tube
Standard: ASTM A519, DIN2391, EN10204-1
Grade: 1020, C45, ST52, ST52.3, 27SiMn, 25Mn 16Mn...
Technology: Cold Drawn, Cold roll, Honed, Skived, Burnished
Application: construction machinery, metallurgical machinery, plastic machinery, mining machinery, road construction machinery, hydraulic and pneumatic cylinders


Size
Manufacturing Process Tube ID Length Straightness Dimensional Accuracy Tolerance on ID Inner Bore Roughness
honing Φ40-800mm ≤13m 0.2-0.3mm H8~H9 ±8% <=0.8 um

Chemical Composition
grade C Si Mn P S Cr Ni Cu V Al
1020 0.17-0.23 0.17-0.37 0.35-0.65 <=0.035 <=0.035 <=0.25 <=0.30 <=0.25 - -
C45 0.42-0.50 0.17-0.37 0.50-0.80 <=0.035 <=0.035 <=0.25 <=0.30 <=0.25 - -
16Mn 0.13-0.19 0.20-0.60 1.20-1.60 <=0.030 <=0.030 <=0.030 <=0.30 <=0.25 - -
27SiMn 0.24-0.32 1.10-1.40 1.10-1.40 <=0.035 <=0.035 <=0.30 <=0.30 <=0.20 - -
ST52 <=0.20 <=0.50 <=1.70 <=0.035 <=0.035 <=0.30 <=0.50 <=0.30 <=0.15 -
ST52.3 <=0.18 <=0.50 <=1.70 <=0.030 <=0.25 <=0.30 <=0.50 <=0.30 <=0.15 ≥0.015

Mechanical Property
Grade Cold finished (hard) (BK) Cold finished (hard) (BK+S) Hardness Impact Value (-20°C) J
T.S bN/mm2 Elongation 85% T.S bN/mm2 Y.S SN/mm2 Elongation 85%
1020 ≥550 ≥8 ≥520 ≥400 ≥15 170 --
C45 ≥680 ≥5 ≥630 ≥520 ≥12 190 --
16Mn ≥640 ≥5 ≥600 ≥520 ≥14 160 --
27SiMn ≥780 ≥5 ≥700 ≥580 ≥10 220 --
ST52 ≥660 ≥8 ≥620 ≥520 ≥15 190 --
ST52.3 ≥660 ≥8 ≥620 ≥520 ≥15 190 ≥27

Size Tolerance(mm)

ID size
ID Tolerance
WT Tolerance
H7 H8 H9 H10 H11
30 +0.0210 +0.0330 +0.0520 +0.0840 +0.1300


±5%
>30-50 +0.0250 +0.0390 +0.0620 +0.1000 +0.1600
>50-80 +0.0300 +0.0460 +0.0740 +0.1200 +0.1900
>80-120 +0.0350 +0.0540 +0.0870 +0.1400 +0.2200
>120-180 +0.0400 +0.0630 +0.1000 +0.1600 +0.2500
>180-250 +0.0460 +0.072 +0.1150 +0.1850 +0.2900
>250-315 +0.0520 +0.0810 +0.1300 +0.2100 +0.3200
>315-800 +0.0570 +0.0890 +0.1400 +0.2300 +0.3600
OD Tolerance OD Tolerance
≤Φ40 ±0.15 Φ160~200 ±0.80
Φ40~60 ±0.25 Φ200~240 ±1.00
Φ60~80 ±0.30 Φ240~340 ±1.50
Φ80~100 ±0.40 Φ340~440 ±2.00
Φ100~160 ±0.50 Φ440~520 ±2.50

Burnished Honed Tube

Liaocheng Xinglong Seamless Tube Manufacturing Co., Ltd. , https://www.lcxlpipe.com