POSEIDON 3720 Guida all'installazione

REPAIR INSTRUCTIONS FIRST STAGE REDUCING VALVE

3720

3720 10

CYKLON

1.0:E83

ANTI-FREEZE CAP

DIFFERENT CONNECTIONS

YOKE

G 5/8’’

SAFETY VALVE

1.0:E84

CYKLON

FIRST STAGE VALVE

3720

Secondary side:

1. Disconnect the low pressure

hose from the first stage valve

using a 13 mm box spanner.

2. Remove the o-ring (30) from the

low pressure hose with the o-

ring remover.

First stage valve with G 5/8’’:

3. Remove the locking screw (22)

with a 6 mm Allen wrench.

Remove the o-ring (24) and the

cup-filter (25) with o-ring (23).

First stage valve with Yoke:

3. Remove the knob (23) and the

protective cap (21). Remove the

locking screw (24) with a 6 mm

Allen wrench. Remove the cup

filter (26) and the o-ring (25).

4. Place the first stage valve with

the secondary side facing

upwards in the fixture.

FIRST STAGE VALVE

3720

Removal:

1. Remove the pressure adjusting

screw (1) with a 6 mm Allen

wrench and remove the spring

(2 and 3).

2. Remove the cover (4) using a

27 mm crowsfoot and the upper

diaphragm center (5).

First stage valve with G 5/8’’:

3. Remove the connection (26)

and the wheel (28) with a 6 mm

Allen wrench.

4. Rernove the o-ring (27) with an

o-ring remover. Make sure the

sealing surfaces are not

damaged.

First stage valve with Yoke:

3. Remove the connection (27)

and the yoke (22) with a 6 mm

Allen wrench.

4. Remove the o-ring (28) with an

o-ring remover. Make sure the

sealing surfaces are not

damaged.

CYKLON

1.0:E85

FIRST STAGE VALVE

3720

Removal:

1. Remove the valve centre, upper (6)

and the diaphragm (7).

2. Remove the diaphragm centre,

lower (8) and the valve needle (9).

3. Remove the valve centre, lower

(10) and the o-ring (11) with an o-

ring remover. Make sure the

sealing surfaces are not damaged.

4. Remove the valve seat (14) and the

o-ring (13) with the assembly

drift A.

5. Remove the valve piston (15) and

the pressure spring (16).

6. Remove the washer, steel (17), the

o-fing (18) and the washer, teflon

(19) with an o-ring remover.

Make sure the surfaces, are not

damaged.

CYKLON

1.0:E86

FIRST STAGE VALVE

3720

Removal:

1. Remove the blind screw (29 and

31) with a 5 mm Allen wrench.

Remove the o-rings (30 and 32)

with an o-ring remover.

Make sure the sealing surfaces

are not damaged.

2. Remove the locking screw (35)

with a 4mm Allen wrench.

Remove the pressure spring (16)

and the valve piston (34).

3. Remove the valve sealing (33)

from the valve piston (34) with

an o-ring remover.

CYKLON

1.0:E87

Cleaning:

If corrosion or salt deposits occurs, place all metal parts in concentrated Hempocid* or 15%

Hydrochloric acid for about 10 minutes. Then rinse them thoroughly and blow dry with air. The

synthetic parts in the second stage must not be treated with solvent.They shall be cleaned in

freshwater only. *Hempocid = Acid Liquid Detergent Containing phosphoric acid (5-10%) and

bactericid for desinfectant cleaning.

FIRST STAGE VALVE,

3720

When servicing the regulator

the following parts should be

replaced:

(see chapter Servicekit)

1. All o-rings

2. Diaphragm

3. Cup filter

4. Valve seat

5. Washer

6. Valve sealing

Checking:

Check the following parts to make

sure the sealing surfaces are

undamaged. Also check that the

threads are not damaged.

1. The blind screws (29 and 3 1)

2. The valve housing (20)

3. Valve centre (10)

4. The connections (26 or 27)

CYKLON

1.0:E88

FIRST STAGE VALVE

3720

Assembly:

1. Install the o-rings(30 and 32) on

the blind screws (29 and 31).

Lubricate the outlets.

2. Screw the blind screws in the

LP-HP outlets. Use a 5 mm Allen

wrench and tighten up by hand.

First stage valve with G 5/8’’:

1. Install the o-ring (27) on the

connection (26). Lubricate the

o-ring and the thread.

2. Install the wheel (28) on the

connection.

3. Screw the wheel connection

assembly into the valve housing

assembly with a 6 mm Allen

wrench.

First stage valve with Yoke:

1. Install the o-ring (28) on the

connection (27). Lubricate the

o-ring and the thread.

2. Install the yoke (22) on the

connection.

3. Screw the wheel connection

assembly into the valve housing

assembly with a 6 mm Allen

wrench.

CYKLON

1.0:E89

FIRST STAGE VALVE

3720

Assembly:

1. Lubricate the valve housing (20).

2. Place on the assembly drift A:

-washer, steel (17)

-O-ring (18)

-washer, teflon (19)

3. Install the valve housing.

Lubricate the washers

and the o-ring.

4. Install the o-ring (13) on the

valve seat (14).

CYKLON

1.0:E90

FIRST STAGE VALVE

3720

Assembly:

1. Place on the assembly fixture B:

- valve centre, lower (10)

- o-ring (1 1),lubricate

- valve seat (14) with o-ring

downwards

- valve piston (15),lubricate,

and pressure spring (16) on valve

piston.

2. Install the valve housing (20).

3. Turn the valve housing (20) with

the secondary side upwards.

4. Install the valve needle (9).

5. Install the lower diaphragm centre

(8).

6. Install the diaphragm (7) in the

valve centre, upper, convex part up

(6). Install the valve housing (20).

CYKLON

1.0:E91

FIRST STAGE VALVE

3720

Assembly:

1. Install the diaphragm centre,

upper (5) in the valve housing

(20).

2. Grease the thread on the cover

(4) and tighten up by hand.

3. Check to make sure that the

parts are correctly installed by

pressing at the valve centre. It

should move approximately

2 mm (1/16’’).

4. Lubricate both ends of the

spring (2 and 3) and install.

Lubricate the thread on

pressure adjusting screw (1),

and tighten 7 turns with a 6 mm

Allen wrench.

5. Install the valve sealing (33) on

the valve piston (34).

6. Install the valve piston (34) and

the pressure spring (16). Install

the locking screw (35) with a 4

mm Allen wrench. Tighten up by

hand.

CYKLON

1.0:E92

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