Cla-val – Cla-Val 100-43 User Manual

Page 4

CLA-VAL

P.O. Box 1325

• Newport Beach, CA 92659-0325 • Phone: 949-722-4800 • Fax: 949-548-5441 • E-mail: [email protected] • Website cla-val.com

N-100-43 Series TDV Valve

OPERATING DESCRIPTION

EQUIPMENT DESCRIPTION

1.The operation of the basic valve is described above.
2. Reference Data
a) Cla-Val Job No.:
b) Cla-Val Dwg. No(s).

(Note: Detailed parts list on a Cla-Val dwg)

B. OPERATION

1. The valve is trimmed and constructed as indicated on the drawing
referenced above.

2. The pilot is a Cla-Val 150-300, Manual Reset Deluge pilot.

Opening Speed – The calculated opening speed for an 8" valve
is 8 seconds from full closed to full open. Flow starts immediately.
If the opening speed proves to be too fast, an orifice can be
installed in the pilot exhaust port.

Closing Speed – Controlling closing speed eliminates surges and
water hammer caused by closing to rapidly.
The closing speed is approximately 25 seconds. This should
eliminate surges. The valve trim is fitted with an orifice nipple in
the control tubing. The closing speed orifice bores are:

4" Valve - .0781" dia.
6" Valve - .1250" dia.
8" Valve - .1719" dia.

PILOT OPERATION

1. Electric – A normally de-energized 3-way N.O. solenoid pro-
vides water or air pressure to the control port of the deluge pilot.
When power is applied to the solenoid coil, inlet to the solenoid
valve is blocked and pressure on the deluge pilot control port is
exhausted to atmosphere. In turn, water pressure trapped in the
control chamber of the main valve is exhausted to atmosphere via
the deluge pilot exhaust port causing the main valve to open.

2. Manual Override – Manual operation of the main valve is done
with a quarter turn ball valve which exhausts water pressure from
the control chamber of the main valve causing it to open.

OPERATING DESCRIPTION FOR DELUGE VALVE (con't)
The I.D. of the manual override valve is greater than the closing
speed orifice. Therefore, the control chamber empties faster than
it is filled.

INSTALLATION
All valves are 150 pound flat faced flanged ends. Use normal
piping installation practices to install. i.e., good alignment is
essential.

The control chamber body assembly flange bolts only require 45
foot pounds of torque to seal the tube diaphragm. The flanges are
metal to metal externally. The tube diaphragm is suspended from
these flanges internally, providing a seal. The sealing capability of
this assembly is very good due to the compression of the thick
solid rubber ends of the tube diaphragm.

MOUNTING POSITION
The valve can be mounted vertically or horizontally. It is usually
preferred to mount so that the adjusting screw or any other acces-
sory controls are easily accessible.