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Class Numbers & Titles | Class Numbers Only | USPC Index | International | HELP |
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Class 251 | VALVES AND VALVE ACTUATION |
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1.1 | BLOW-OUT PREVENTERS (I.E., COOPERATING SEGMENTS OF ANNULUS) |
3 | PATTERN TRACER CONTROLLED ACTUATOR |
4 | TUBE COMPRESSORS |
5 | Fluid pressure actuated |
6 | Roller tube contacting element |
7 | Perpendicularly reciprocating tube contacting element |
9 | Pivoting tube contacting element |
11 | HEAT OR BUOYANCY MOTOR ACTUATED |
12 | FLUID ACTUATED OR RETARDED |
14 | Fluid and non-fluid actuators |
15 | Compulsory cut-off after flow period |
16 | Serial main line cut-off and manual valves (e.g., hydraulic "fuses") |
19 | Auxiliary pilot valve overrides a first pilot valve |
20 | Forced return of actuator to cut-off position |
21 | Actuator connection released on opening of cut-off valve |
22 | Control fluid released into closed build-up chamber |
23 | Dashpot interconnects actuator and valve |
24 | Venturi or line flow effect assisted |
25 | Pilot or servo type motor |
26 | Alternative pressure sources or pilot valve |
27 | Servo failure responsive control of main valve |
28 | Fluid actuated pilot valve |
30.01 | Electrically actuated pilot valve |
31 | Double or oppositely acting motor units |
32 | Latched pilot valve |
33 | Choked pressure type servo motor |
34 | With reverse flow prevenging (nonsiphoning) |
35 | Variable choke passage according to valve position |
36 | With separate dashpot or choked fluid retarding chamber |
37 | With choke or restrictor in main line |
38 | Pilot valve seated in motor or valve element |
41 | Remote pilot valve actuation |
42 | Adjustable opening limit for main valve |
43 | Main valve biased open by line pressure |
47 | With separate dashpot or choked fluid retarder |
48 | Dashpot or fluid controlled retarder or timer |
49 | Latch or trip releasing |
50 | Line pressure connected dashpot or choke chamber |
53 | Line connected open accumulating chamber |
54 | Closed fluid circuit dashpot or choke chamber |
55 | With choke by-pass or relief means |
56 | Plural operations (e.g., lifting and rotating rotary valve) |
57 | Fluid link or column actuator |
58 | With mechanical movement between actuator and valve |
59 | Rotary or oscillatory motor |
60 | With adjustable limit stop for actuator |
61 | Flexible wall expansible chamber reciprocating valve actuator |
62 | Piston type expansible chamber reciprocating valve actuator |
64 | WITH NON-FLUID RETARDER |
65 | PERMANENT OR CONSTANTLY ENERGIZED MAGNET ACTUATOR |
66 | BIASED TRIP |
67 | With second diverse control |
68 | Electrical trip actuation |
72 | Weight biased trip |
73 | Fluid pressure trip actuation |
74 | Mechanical movement trip actuation |
75 | WITH SNAP ACTION |
76 | IMPACT TYPE ACTUATOR |
77 | LOST MOTION BETWEEN ACTUATOR AND VALVE |
84 | VALVE HEAD MOVABLY CONNECTED FOR ACCOMMODATION TO SEAT |
85 | With yieldable connection |
86 | With universal connection |
87 | With single plane swing pivoted connection |
88 | Rotatable only |
89 | WITH MEANS FOR BLOCKING OR DISABLING ACTUATOR |
89.5 | Actuator, or blocking means, includes flow path joint |
90 | Attachments |
94 | Fluid pressure biased latch |
95 | Released by non-valving actuator motion |
101 | Latch manipulator mounted on handle or stem |
102 | Constrained linear motion |
103 | With pivoted latch |
104 | With latch rigidly associated with manipulator |
106 | With transversely movable latch |
107 | With pivoted latch |
110 | With reciprocating latch |
111 | Latch manipulator mounted on valve body |
117 | WITH RESTRICTOR IN PARALLEL TO MAIN VALVE |
118 | WITH MATERIAL GUIDE OR RESTRICTOR |
119 | Aspirated stem drain |
120 | Movable or resilient guide or restrictor |
123 | Valve at point of greatest restriction |
125 | Drop forming restrictor |
126 | Spiral guide or spiral restrictor |
127 | Baffle or zigzag flow restrictor |
128 | WITH DETACHABLE ACTUATOR AND MEANS TO PREVENT LEAKAGE WHEN ACTUATOR IS DETACHED |
129.01 | ELECTRICALLY ACTUATED VALVE |
129.02 | With means to bias valve open |
129.03 | With nonelectrical actuator |
129.04 | Remote or follow-up control system for electrical actuator |
129.05 | Having means to produce digital pulses |
129.06 | Having element dimensionally responsive to field |
129.07 | Balanced valve |
129.08 | Having means to produce proportional flow |
129.09 | Solenoid having plural coils |
129.11 | Rotary electric actuator |
129.14 | Freely rotatable ball valve |
129.15 | Including solenoid |
129.16 | Having plate-shaped armature |
129.17 | Having diaphragm between coil and opening controlled |
129.18 | With means to adjust stroke of armature |
129.19 | Lost motion between valve and valve actuator |
129.2 | Mechanical movement between valve and solenoid |
129.21 | Coil surrounds valve port or flow line |
129.22 | Solenoid within flow line |
142 | WITH CORRELATED FLOW PATH |
149 | Valve operated by joining flow path sections |
149.8 | Valve operated by motion of flow path |
149.9 | Flow path joint interlocked with valve or actuator |
144 | Tank |
145 | Pipe side |
147 | Pipe end (terminal valve) |
148 | Pipe coupling or union |
150 | Flexible or expansible |
151 | Non-rotatable conduit coupling |
152 | Valve seat and coupling element removable as a unit |
143 | With mounting or support |
153 | With particular outlet or inlet |
157 | WITH MEANS TO INCREASE HEAD AND SEAT CONTACT PRESSURE |
158 | With positive reduction |
159 | Seat pressed to valve |
160 | Rotary valve |
167 | Bifaced |
170 | Seat pressed to valve |
175 | Fluid pressure |
176 | Spring |
187 | Separate actuators or actuator motion |
190 | Piston |
192 | Rotary valve |
193 | Gate valve |
205 | WITH SELECTIVE FLOW REGULATION |
210 | SEQUENTIAL OPENING OR CLOSING OF SERIAL PORTS IN SINGLE FLOW LINE (E.G., ANTI-SCORING) |
211 | SERIAL ALTERNATELY CLOSED PORTS |
212 | RELATIVELY MOVABLE VALVE ELEMENTS FORM SINGLE PORT CLOSURE (E.G., IRIS DIAPHRAGM) |
213 | MECHANICAL MOVEMENT ACTUATOR |
214 | Particularly packed or sealed |
215 | Plural motions of valve |
216 | Screw threads in flow path |
217 | Valve head between actuator and screw |
218 | Encased |
225 | Threads in removable sleeve |
226 | Biased |
228 | With pivoted valves |
229 | Plural dissimilar mechanical movements |
230 | Ratchet |
231 | Lever |
232 | Train (plural serial) |
233 | Leverage variable during operation |
234 | Adjustable leverage |
235 | Swiveled |
236 | Biased |
248 | Gear |
251 | Cam |
264 | Screw |
265 | Plural thread |
266 | Non-reciprocating actuator |
273 | Internal thread |
274 | Encased |
277 | Biased |
279 | Linkage |
281 | BALANCED VALVES |
284 | LIMIT STOP |
289 | VALVE ACTUABLE FROM PLURAL POSITIONS |
290 | PLURAL SELECTIVE NEUTRAL POSITIONS FOR VALVE OR ACTUATOR |
291 | DETACHABLE ACTUATOR |
293 | EXTENSION FOR ACTUATOR |
294 | FLEXIBLE ACTUATOR (E.G., BOWDEN WIRE; CHAIN) |
295 | PEDAL ACTUATOR |
296 | PLURAL MOTIONS OF ACTUATOR |
297 | WITH FRICTION DETENT |
298 | PIVOTED VALVES |
304 | ROTARY VALVES |
305 | Butterfly |
309 | Plug |
313 | Biased |
315.01 | Ball valve |
315.02 | Having a particular hardness (i.e., durometric property) |
315.03 | Of specific material |
315.06 | Having a swinging actuator |
315.07 | Eccentric seating |
315.08 | Including trunnion opposite axially extending actuating means |
315.1 | Housing construction |
315.11 | Head removable perpendicular to flow passage |
315.13 | Assembled around the head |
315.14 | Head removable along one side of flow passage |
315.15 | Having inseparable head |
315.16 | Ball construction |
314 | Seat or interface seal |
318 | RECIPROCATING VALVE |
319 | Push or pull operator |
324 | Piston |
326 | Gate |
330 | Actuator controlled stem seal |
331 | Diaphragm |
332 | Diverse material seal at valve interface |
333 | Particular head and seat cooperation |
335.1 | HERMETIC FLEXIBLE WALL SEAL FOR ACTUATOR |
336 | BIASED VALVE |
339 | VALVE ACTUATOR EXTENDING THROUGH FLUID INLET OR OUTLET |
340 | VALVE ACTUATOR SURROUNDING PIPE, INLET OR OUTLET |
341 | VALVE ACTUATOR IS VALVE CASING OR EXTENSION THEREOF |
342 | Jointed or flexible wall |
343 | Sleeve valve |
346 | Plural motions of valve |
347 | Reciprocating valve |
348 | Biased valve |
349 | VALVE ACTUATOR IS INLET OR OUTLET |
355 | WITH ACTUATION LUBRICATING MEANS |
356 | VALVE |
357 | Removable seat engaging element |
358 | Reinforced flexible material |
359 | Seats |
366 | Bodies |
368 | Materials |
369 | MISCELLANEOUS |
CROSS-REFERENCE ART COLLECTIONS | ||
900 | VALVES WITH O-RINGS |
901 | CURTAIN TYPE VALVES |
902 | SPRINGS EMPLOYED AS VALVES |
903 | NEEDLE VALVES |
904 | SNAP FIT PLUG VALVES |
905 | MOVABLE COIL ELECTRICAL ACTUATOR (E.G., VOICE COIL) |
FOREIGN ART COLLECTIONS | ||
FOR000 | CLASS-RELATED FOREIGN DOCUMENTS |
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