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Summary of Contents for POSEIDON 3790
- Page 1 JETSTREAM REPAIR INSTRUCTIONS FIRST STAGE REDUCING VALVE 3790 - First stage G 5/8” 3790-10 - First stage YOKE ANTI-FREEZE CAP DIFFERENT CONNECTIONS YOKE G 5/8’’ SAFETY VALVE 1.0:E32...
- Page 2 JETSTREAM FIRST STAGE VALVE 3790 Secondary side: 1. Disconnect the low pressure hose from the first stage valve using a 13 mm open end wrench. 2. Remove the o-ring (30) from the low pressure hose with the o- ring remover.
- Page 3 JETSTREAM FIRST STAGE VALVE 3790 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).
- Page 4 (10) and the o-ring (11) with an o- ring remover. Make sure the sealing surfaces are not damaged. 4. Remove the o-ring (12), only 3790, from the valve centre, lower (10) with an o-rings remover. Make sure the surfaces are not damaged.
- Page 5 JETSTREAM FIRST STAGE VALVE 3790 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.
- Page 6 JETSTREAM FIRST STAGE VALVE, 3790 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.
- Page 7 JETSTREAM FIRST STAGE VALVE 3790 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 hexagon spanner and tighten up by hand.
- Page 8 JETSTREAM FIRST STAGE VALVE 3790 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).
- Page 9 JETSTREAM FIRST STAGE VALVE 3790 Assembly: 1. Place on the assembly fixture B: - valve centre, lowér (10) - o-ring (11), lubricate - valve seat (14) with o-ring downwards - valve piston (15), lubricate, and pressure spring (16) on valve piston.
- Page 10 JETSTREAM FIRST STAGE VALVE 3790 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.
- Page 11 JETSTREAM FIRST STAGE VALVE 3790 Assembly: 1. Place the valve housing (20) in a fixture. 2. Tighten the cover for valve housing with a torque wrench (30 Nm) and an open ended insert tool 27 mm. 3. Tighten the connection with a torque wrench (30 Nm) and holder insert tool/ bits.
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