Flomatic C1001C Installation Manual

Operation & Maintenance Manual

Place this manual with valve, or person responsible for maintenance of the valve

Model C1001C/CF1001C-Hydraulic Check Valve

YOUR PRODUCT INFORMATION:
Model Number:_________________
Date:_________________________
Serial Number:_________________
Valve Size:____________________
Check Valve Model:______________

High Quality Valves Built to Last...

15 PRUYN'S ISLAND DRIVE

GLENS FALLS, NY 12801

800-833-2040 * 518-761-9797 * Fax: [phone]

worldwideweb://www.flomatic.com * e-mail: [e-mail]

FILE: C1001C
Rev 2

HYDRAULIC CHECK VALVE

The Model C1001C Hydraulic Check Valve opens and closes at controlled, adjustable speeds to provide for smooth
piston operation and reduce pressure surges associated with conventional check valves.
When the upstream (inlet) pressure is greater than the downstream (outlet) pressure, the piston moves to the open
position at a controlled speed by exhausting control water from above the diaphragm (piston) to the downstream side
through an adjustable needle valve.
When the upstream pressure becomes less than the downstream pressure, the piston closes to prevent reverse flow at
a controlled speed by introducing control water above the diaphragm from the downstream side through a second
needle valve.
Adjustment of the needle valve will provide "slow opening and slow closing," "rapid opening and slow closing" or
"slow opening and rapid closing." (If immediate closure is required, a built-in check feature may be included to replace
the controlled hydraulic closure.)

Part List

1. Shut-Off Valve

2. Strainer

3. Needle Valve (Closing Speed
Control)

4. Needle Valve (Opening Speed
Control)

5. Check Valve

6. Finger Strainer

SHIPMENT:

INSTALLATION:

START-UP:

When shipped, controls are usually mounted on the main valve. If control subassemblies
are shipped separately, all connections are tagged to insure correct assembly.

1. Flush the pipeline before inserting the valve.

2. Install the valve with the "arrow" on body pointing in the direction of flow (usually
towards the tank or reservoir).

3. Attach subassemblies to main valve if necessary.

4. Install 1/4" pet cocks at the backside of valve.

5. Allow enough clearance above valve for removal of piston assembly.

1. Install pressure gauges to inlet and outlet.

2. Open both shut-off valves on the control assembly.

3. Open 1/8" air bleeder at the top of the valve. (Re-close after step 4 or step 5.)

4. Open main line shut-off valve (usually a gate or butterfly valve) on the outlet side of the

main valve about 1/4 open.

5. Slowly open main line shut-off valve on the inlet side and observe pressure gauges.

When the outlet pressure gauge shows that the downstream pressure is being controlled,
this shut-off valve may be opened more rapidly.

6. If the outlet pressure requires adjustment, turn the adjusting screw of the pilot valve

counter clockwise to decrease, clockwise to increase. CAUTION: any adjustment
should be done slowly.

Information needed to order replacement parts:

Valve Size ________________
Serial # ________________
Model # C1001C

Main Valve

Open Position

1

Shut-Off Valve

Exterior Valve Components

5

Check Valve

3 & 4

Needle Valve

2

Strainer

6

Finger Strainer

TROUBLE SHOOTING GUIDE

A. PROBLEM : Valve is open and will not regulate flow.

CAUSE

1. Main valve is air bound.

2. Shut-off (isolation) valve at the outlet side of valve is
closed.

3. Damaged or fouled solenoid pilot seat or core tube as­sembly of solenoid pilot valve.

4. Fouled needle valve.

5. Fouled strainer.

6. Ruptured diaphragm in main valve.

7. Debris lodged under the seat of main valve.

8. Worn seat packing and/or seat ring in main valve.

9. Leaking in plumbing fittings.

10. Damaged O-ring stem seal.

11. Outlet check valve is stuck open.

B. PROBLEM: Valve is closed and will not open.

1. Coil of N.C. solenoid pilot is burned out.

2. Fouled solenoid pilot.

3. Pilot is adjusted to low.

4. Needle valve #3 is open wider the needle valve #4

CORRECTION

1. Open 1/8" air bleeder at the top of valve to release air.

2. Open shut-off valve.

3. Clean or replace solenoid pilot.

4. Open needle valve (counter clockwise) to flush seat, &
after 4 or 5 seconds return to original setting, or remove
and clean orifice.

5. Disassemble, clean or replace screen.

6. Replace diaphragm.

7. Disassemble, clean and replace damaged parts.

8. Disassemble, clean and replace damaged parts.

9. Tighten or replace fitting.

10. Disassemble and replace O-ring.

11. Replace check valves.

1. Replace coil.

2. Clean or replace solenoid pilot.

3. Adjust pilot.

4. Adjust needle valves.

Test To Isolate Source Of Problem

(After visual inspection of external leaks)

1. With the main line gate valves open and the reducing valve pressurized, close the control shut-off (isolation) valve
at the outlet side of the pressure reducing pilot control. THE MAIN VALVE SHOULD CLOSE.

If the valve remains fully open the source of the problem could be:

(A) fouled orifice or needle; (B) fouled strainer; (C) control shut off valve at inlet is closed; (D) ruptured main valve diaphragm.

If the valve is partially closed the source of the problem could be:

(A) damaged: main valve seat packing or seat ring; (B) debris under seat; (C) main valve is air-bound; (D) damaged stem O-ring.

If the valve closes fully, the source of the problem could be:

(A) pilot valve out of adjustment; (B) damaged pilot valve stem or set ring; (C) partially fouled strainer or needle valve.

2. With the main line gate valves open and the reducing valve pressurized, close both shut-off (isolation) valves and
open the air bleeder pet cock to release water out of the power chamber above the diaphragm of the reducing valve.
Water will flow from the pet cock as the valve moves to the full open position.

If water continues to flow, the source of the problem could be:

(A) damaged: main valve diaphragm or stem seal O-ring; (B) loose locknut.