Product Overview | 1177E-EP2 Control Valve
SPECIFICATIONS
The 1177E-EP2 Control Valve is an electro-pneumatically controlled direct acting butterfly valve capable of handling fluids up to 800°F. For control input the valve uses a 4-20mA signal, and also features a feedback unit with 4-20mA output . The 1177E-EP2 is capable of a full open-close-open cycle in less than 2 seconds for all sizes. This makes it ideal for applications which require a fast acting valve. The valve seats against machined seats in the body to prevent over-travel and provides a low leak rate. (See table 1). All 1177E-XX-EP2 Valves must be installed with the shaft in a horizontal orientation. Maximum ambient temperature must not exceed 176°F. See sheet “Supply Air Requirements 1177D-EP2/1008-EP2” for air quality information. Each valve is supplied with a ¼ " miniature .01 micron automatic pulse drain coalescing filter to be installed in the compressed air supply line. Required supply air pressure is 70-90 psig. INSTALLATION
— Valve Body Material: Heat Resistant Cast Iron — Valve Disc Material: 316 SS — Valve Shaft Material: 316 SS — Disc Clamp Material: 316 SS — Disc Clamp Hardware: 304 SS — Compressed Air Supply Pressure: 70-90 psig — Maximum Operating Pressure: 2 psig — Wafer Style Design — -6 thru -14 ANSI class 150 flange — -16 RPM flange — Maximum Fluid Temperature: 800°F — Maximum Ambient Temperature: 176°F — Minimum Ambient Temperature: -4°F — Actuator Cycle Rating (closed to open to closed): 1,000,000 — Max Travel Time (open-close-open): 2 seconds — Position Indication: Visual Indication on positioner — Input 4-20mA — 4-20mA Position Transmitter — 10-30 VDC (24 VDC recommended) — LCD display with keypad
— HART protocol — Nema 4X (IP65) — EP4 = explosion proof, Class I, Div. II, Group A, B, C, D, Class II, Div. II, Group E, F, G
CAPACITY INFORMATION Flow is rated in SCFH, 70% open with a 1”w.c. drop at 70°F. and 14.7 PSIA. Leak rate is rated in SCFH with 1 PSI backpressure.
Table 1
Valve Designation 1177E-6-EP2 1177E-7-EP2 1177E-8-EP2 1177E-9-EP2 1177E-10-EP2 1177E-12-EP2 1177E-14-EP2 1177E-16-EP2
Size (inches)
Cv @ 70%
Flow @ 70%
Leak Rate
3 4 6 8
225 333 814
9,650 14,300 35,000 56,000 88,500 137,000 195,000 254,000
330 360 780
1,303 2,059 3,188 4,538 5,910
1350 2230 3200 3700 4200
10 12 14 16
Change in flow and pressure drop across the valve is negligible when changing from 70% open to wide open unless inlet pressure is increased substantially to maintain the 1"w.c. pressure drop, which is why the sizing table shows capacities at 70% open.
Bulletin 1177E-EP2 Page 2
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