ALUMINUM VENT VALVES
NAVSEA 805-1749102/1749103 Rev B
Figure 640 and 660
Round and Oval
Round and Oval
FEATURES
- Designed for use as an airtight and watertight closure
- MIL-S-901 Shock Test Compliant
- MIL-STD-167-1 Vibration Test Compliant
- Used on All Navy Ship Classes
- Lightweight
- MADE IN THE USA
GENERAL APPLICATIONS
- HVAC Applications
- Intake and Exhaust Air
TECHNICAL DATA
Size Range: 2-1/2” – 30 Round”
7×3” – 30×20 Oval”
Body Style: Wafer
Pressure Rating: 15 PSI Working
30 PSI Test
7×3” – 30×20 Oval”
Body Style: Wafer
Pressure Rating: 15 PSI Working
30 PSI Test
PART NUMBER NOMENCLATURE
TRIM
PART
SIZE
FIGURE
END VARIATION
359
703
YYY
640 ROUND
660 OVAL
660 OVAL
001
VALVE SIZE-ROUND
PART NUMBER ROUND
VALVE SIZE – OVAL
PART NUMBER OVAL
R2.5 2-1/2″
359-703-025-640-001
K31 7″X3″
359-703-310-660-001
R3 3″
359-703-030-640-001
K32 8″X4″
359-703-320-660-001
R3.5 3-1/2″
359-703-035-640-001
K33 9″X5″
359-703-330-660-001
R4 4″
359-703-040-640-001
K34 11″X6″
359-703-340-660-001
R5 5″
359-703-050-640-001
K35 13″X7″
359-703-350-660-001
R6 6″
359-703-060-640-001
K36 16″X8″
359-703-360-660-001
R8 8″
359-703-080-640-001
K37 20″X9″
359-703-370-660-001
R10 10″
359-703-100-640-001
K38 24″X10″
359-703-380-660-001
R12 12″
359-703-120-640-001
K39 24″X15″
359-703-390-660-001
R14 14″
359-703-140-640-001
K40 30″X16″
359-703-400-660-001
R16 16″
359-703-160-640-001
K41 30″X20″
359-703-410-660-001
R18 18″
359-703-180-640-001
R20 20″
359-703-200-640-001
R24 24″
359-703-240-640-001
R30 30″
359-703-300-640-001
MATERIALS OF CONSTRUCTION
BODY
ALUMINUM
DISC
AL/GRAY EPOXY CTD
STEMS
316SS
SEAT
NEOPRENE
BUSHING
ACETAL
PACKING
BUNA-N (WHERE REQUIRED)