Watts EMVII-6400-SS - Manual (Page 2)

Maintenance
During its’ normal service life the only maintenance that may be
required by your EMVII-6400SS should be periodic stem seal
adjustment. It is important that stem seal leaks to not go unat-
tended as failure to adjust stem packing could signifi cantly reduce
seal life.
To adjust stem seals, simply tighten the stem gland nut. Do not
Over Tighten, as in doing so you may over-compress stem seals
which could result in excessive stem seal loading and reduction
of seal life.
IV. Switch Setting (Travel Limits)
A. 1 ⁄
4
" - 1 1 ⁄
2
" (8 - 40mm)
1. As stated earlier in this manual, your unit is supplied with 6
functional terminal connections. Terminals 4, 5, and 6 are
provided for rotational travel limits of the actuator. Terminal 5 is
common. Application of power between terminal 4 and 5 will
open the valve, while powering between terminal 5 and 6 will
close the valve.
2. On all 1 ⁄
4
"-1 1 ⁄
2
" (8 - 40mm) models the actuator utilizes a one
piece camshaft, therefore, setting one switch will set all three.
3. Viewing the actuator from the top, note that the Top switch
(aux) ties into terminals 1, 2, and 3, the Middle switch ties into
terminals 4 and 5 (open circuit) and the Bottom switch ties
into terminals 5 and 6 (close circuit).
4. To set all 3 circuits:
a.
Disconnect power supply
b. Remove actuator cover
c. Place valve in its’ fully open position
d. Loosen camshaft retaining screw
e. Using the middle switch detent, rotate the camshaft until the
middle switch arm drops into the middle cam detent
f. Retighten the camshaft retaining screw
g.
Reinstall cover
h. Recheck all wiring connections prior to testing the unit.
Operational Characteristics and Ratings
1. Valve type - Quarter turn ball valve, bronze body, 316SS ball
and stem, reinforced Tefl on ® seats, standard port.
2. Valve Ratings: 1 ⁄ 4 "-1 1 ⁄ 2 " (8 - 40mm) 600psi WOG
(41.9 bar); 100psi (6.9 bar) WSP
3. Valve end connections: All sizes NPTF.
4. Max. actuator ambient temperature rating: 150°F (65.6ºC).
5. Max. amperage rating of aux. switch: 10 AMPS
@ 115 VAC.
Table 3 - Steam Flow (#hr) - Full Open Valve
10 psi INITIAL 15 psi INITIAL 25 psi INITIAL
VALVE SIZE 1psi 10psi 1psi 15psi 1psi 25psi
in. mm ΔP ΔP ΔP ΔP ΔP ΔP
1 ⁄
4
- 3 ⁄
8
8, 10 92 197 142 218 255 349
1 ⁄ 2 15 131 282 203 311 365 498
3 ⁄ 4 20 358 767 551 848 992 1355
1 25 358 767 754 1159 1357 1853
1 1 ⁄
4
32 358 767 1024 1574 1843 2516
1 1 ⁄
2
40 358 767 1643 2526 2957 4037
Table 2
VALVE SIZE
in. mm C V
1 ⁄
4
- 3 ⁄
8
8, 10 6.3
1 ⁄
2
15 9.0
3 ⁄
4
20 24.5
1 25 33.5
1 1 ⁄ 4 32 45.5
1 1 ⁄
2
40 73.0