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CAUTION
Please refer to the manual attached to the product for procedures for installation and operation.
OB-2000 series Temperature Regulator – Annex
Precautions for installation
· Installation of body
1. Check that there is no foreign substances inside the piping before installation.
2. Install the product to horizontal piping with the posture in which the diaphragm chamber faces downwards.
3. Check the direction of the product so that the fluid flowing and the arrow marked on the body are in the
same direction.
4. Be sure to install pressure gauges, strainers, and a bypass line to the piping.
5. The heating fluid pressure should be reduced with a pressure reducing valve if it exceeds the maximum
pressure.
6. Before stopping operation of the product for an extended period, completely discharge the condensate
inside the product and piping, and close the stop valves installed at before and after the product.
7. Before leading fluid into the product, be sure to remove foreign substances from the piping completely by
using a bypass line.
· Installation of thermal bulb
1. Although the thermal bulb can be mounted in any posture, make sure that more than 3/4 of its total length
is in direct contact with the fluid to be heated.
2. Screw in the bushing first, then use the washer of packing to secure the thermal bulb.
3. The bend radius of the capillary tube should be more than 40 mm. Avoid bending at a sharp angle, twisting
or pulling it with force. Secure the capillary tube not to allow it touch steam piping.
4. Install a thermometer close to the thermal bulb.
5. When inserting the thermal bulb into the piping for temperature detection, it should be installed at a point
where the circulation is best.
· Procedures for assembling pilot valve and sensor
Place the bellows follower, with its flat face downward, into the bellows. And then, screw the ring into the
bellows.
Please be careful not to lose the bellows follower attached to the product.
OB-2000
main valve
Completely discharge the internal pressure from the valves before disassembly.
Temperature Regulator – Annex
OB-2000P
pilot valve
Bellows follower
Bellows
Ring
www.yoshitake.jp
OB-2000 series
13
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