
Niro Soavi S.p.A
4.6. OVERPRESSURE VALVE AND PRESSURE GAUGE
4.6.1 OVERPRESSURE
VALVE
The pressure relief valve (see SECTION 3 - Paragraph 3.7.1) is usually
installed on the compression head or on the high-pressure delivery line to
protect the machine and operators from accidental overpressure which can
create risk of danger.
Maintenance (figure 4.6.1) requires only checking and, if necessari, replacing
the sealing gaskets (B) between head and seat (D) of the valve, of the anti-
extrusion rings (A, C), of the ball (N) and of the valve seat (D).
To disassemble the valve from its operating position slowly loosen the nuts (G)
and pull out the complete valve (J) and the flange (F).
Loosening of the nuts (G) involves gradually releasing the spring load until the
ball pressing shaft reaches the elastic ring stop (L).
Once the whole valve body has been removed, you can remove the ball (N) and
then the seat (D); if necessary use an extractor for the extraction slot provided
in the seat (D).
After that remove the O-ring (B) and the anti-extrusion rings (A)and (C).
Make sure you do not lose the ball (E), as the valve cannot work without it; we
recommend you always keep a spare seat and ball in case you need to replace
them.
Valve maintenance does NOT require replacing the spring; to avoid sudden
release of the spring’s preloading DO NOT remove the elastic ring (L)..
Carefully clean the seat (B) from any product residues but take care not to
damage the sealing area.
If the sealing area between the seat (B) and the ball (N) is damaged or worn
out, there can be product leaks and the valve can be triggered at a pressure
value lower than the valve setting; we therefore recommend you replace the
seat and, if required, the ball.
Steps to be followed for disassembly:
-
Insert anti-extrusion ring (A), gasket (B) and anti-extrusion ring (C) in
their housing in the head; food-grade Vaseline or other suitable
lubricants should be used for easier assembly
-
Insert the seat (D) inside the housing in the head, complete with O-ring
gasket (E)
-
place the ball (N) in position making sure it will not fall down, and fit the
complete valve body (J) with its flange (F) so that the middle shaft rests
on the ball (N)
4c063e0c.doc 4.6.1
Содержание ARIETE
Страница 7: ......
Страница 10: ......
Страница 18: ...Niro Soavi S p A FIGURE 2 2 2 2C001E0C DOC 2 2 2 ...
Страница 52: ...Niro Soavi S p A FIGURE 3 2 1 2 1 D A B C FIGURE 3 2 2 3C001E0C DOC 3 2 3 ...
Страница 76: ...Niro Soavi S p A 3 9 SPECIAL FEATURES OF NON STANDARD MACHINES BLANK PAGE Ricerca Guasti 21 2 ...
Страница 83: ...Niro Soavi S p A ORDINARY MAINTENANCE LOG When hrs Action required Mach hrs Operator Date 4c010e0c doc 4 2 5 ...
Страница 93: ...Niro Soavi S p A 4C042E0C DOC 4 4 8 FIGURE 4 4 3 FIGURE 4 4 3 ...
Страница 109: ...Niro Soavi S p A FIGURE 4 6 1 4c063e0c doc 4 6 3 ...
Страница 134: ...Niro Soavi S p A FIGURE 4 9 1 4c091e0c doc 4 9 4 ...
Страница 155: ...Niro Soavi S p A 5C001E0C DOC 5 3 3 ...
Страница 160: ......
Страница 162: ......
Страница 164: ......
Страница 166: ......
Страница 168: ......
Страница 170: ......
Страница 172: ......
Страница 174: ......
Страница 176: ......
Страница 178: ......
Страница 180: ......
Страница 182: ......
Страница 184: ......
Страница 186: ......
Страница 188: ......
Страница 190: ......
Страница 192: ......
Страница 195: ......
Страница 196: ...Niro Soavi S p A SECTION 6 ELECTRICAL DIAGRAMS INDEX 6 1 ELECTRICAL DIAGRAMS 6C001E0C DOC 6 1 0 ...
Страница 201: ......
Страница 202: ......
Страница 203: ......
Страница 211: ......
Страница 212: ......
Страница 213: ......
Страница 214: ......
Страница 215: ......
Страница 216: ......
Страница 217: ......
Страница 218: ......
Страница 219: ......
Страница 220: ......
Страница 221: ......
Страница 222: ......
Страница 223: ......
Страница 224: ......
Страница 225: ......
Страница 226: ......
Страница 227: ......
Страница 228: ......
Страница 229: ......
Страница 230: ......
Страница 231: ......
Страница 232: ......
Страница 233: ......
Страница 234: ......
Страница 235: ......
Страница 236: ......
Страница 237: ......
Страница 238: ......
Страница 239: ......
Страница 240: ......
Страница 241: ......
Страница 242: ......
Страница 243: ......
Страница 244: ......
Страница 245: ......
Страница 246: ......
Страница 247: ......
Страница 248: ......
Страница 249: ......
Страница 250: ......
Страница 254: ......
Страница 255: ......
Страница 264: ......
Страница 265: ......
Страница 266: ......
Страница 270: ......
Страница 272: ......
Страница 330: ......
Страница 331: ......
Страница 332: ......
Страница 373: ...VLT 5000 Series Mechanical dimensions cont MG 51 A1 02 VLT is a registered Danfoss trade mark 39 Technical data ...
Страница 374: ...VLT 5000 Series Type H Nema 1 IP 54 Type I IP 00 MG 51 A1 02 VLT is a registered Danfoss trade mark 40 ...
Страница 390: ...VLT 5000 Series MG 51 A1 02 VLT is a registered Danfoss trade mark 56 ...
Страница 401: ...VLT 5000 Series Electrical installation MG 51 A1 02 VLT is a registered Danfoss trade mark 67 Installation ...
Страница 423: ...VLT 5000 Series RELATIVE EXTERNAL PRESET MG 51 A1 02 VLT is a registered Danfoss trade mark 89 Special functions ...
Страница 429: ...VLT 5000 Series MG 51 A1 02 VLT is a registered Danfoss trade mark 95 Special functions ...
Страница 532: ...Niro Soavi S p A SECTION 7 SUPPLIERS CATALOGUE INDEX 7 1 SUB SUPPLIERS AND COMPONENTS CATALOGUE 7C001E0C DOC 7 1 0 ...
Страница 542: ......
Страница 543: ......
Страница 544: ......
Страница 546: ......
Страница 547: ......
Страница 548: ......
Страница 549: ......
Страница 550: ......
Страница 551: ......
Страница 554: ......
Страница 555: ......
Страница 556: ......