Kerotest MODEL-1 - Page 6

TITLE:
NO.:
KEROTEST MODEL-1
REV.: 10
GATE VALVE
DATE: 7/12/07
OPERATIONS MANUAL
PAGE: 6 OF 35
This report is the property of Kerotest Manufacturing Corp. 5500 Second Avenue, Pittsburgh, PA 15207 and may not be
copied by any means without the expressed written consent of Kerotest. It is intended for the sole purpose of helping
Kerotest customers evaluate Kerotest products and may not be released to any third party or otherwise used in any
manner injurious to the interests of Kerotest.
TESTING
TO BE CERTAIN THAT ALL VALVES SHIPPED FROM THE FACTORY ARE BUBBLE
TIGHT, THEY ARE SUBJECTED TO THE FOLLOWING TESTS.
HYDROSTATIC SHELL TEST
SIZE
285 MOP
500 WOG
740 MOP
TIME
MINUTES
PRESSURE
(PSIG)
TIME
MINUTES
PRESSURE
(PSIG)
TIME
MINUTES
PRESSURE
(PSIG)
1" THRU 4"
2
450
2
875
2
1125
6" THRU 8"
5
450
5
875
5
1125
10"
5
450
NA
NA
5
1125
12" AND 16"
15
450
NA
NA
15
1125
HYDROSTATIC SEAT TEST
SIZE
285 MOP
500 WOG
740 MOP
TIME
MINUTES
PRESSURE
(PSIG)
TIME
MINUTES
PRESSURE
(PSIG)
TIME
MINUTES
PRESSURE
(PSIG)
2" THRU 4"
2
315
2
550
2
815
6" THRU 10"
5
315
**5
550
5
815
12" AND 16"
10
315
NA
NA
10
815
*TIME LISTED PER EACH SIDE
**10" NOT APPLICABLE
AIR SHELL TEST
SIZE
285 MOP
500 WOG
740 MOP
TIME
MINUTES
PRESSURE
(PSIG)
TIME
MINUTES
PRESSURE
(PSIG)
TIME
MINUTES
PRESSURE
(PSIG)
1" THRU 4"
2
150
2
150
2
150
6" THRU 10"
5
150
5
150
5
150
12" AND 16"
10
150
10
150
10
150
AIR SEAT TEST
SIZE
285 MOP
500 WOG
740 MOP
TIME
SECONDS
PRESSURE
(PSIG)
TIME
SECONDS
PRESSURE
(PSIG)
TIME
SECONDS
PRESSURE
(PSIG)
1" TO 8"
30
80 TO 100
30
80 TO 100
30
80 TO 100
10",12",16"
60
80 TO 100
60
80 TO 100
60
80 TO 100
*TIME LISTED PER EACH SIDE
THE ABOVE TESTS EQUAL OR EXCEED THOSE VALVE TESTS REQUIRED BY
MSS SP-70 AND API 6D
NOTE: VALVES BUILT BEFORE CHANGE TO FEDERAL CODE IN JULY 2006 WERE
RATED AS FOLLOWS:
CLASS 150 – 275 MOP
CLASS 300 – 720 MOP