PNEUMATIC GLOBE VALVE

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Archibald Fowler
5 years ago
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1 S & FLAP VALVES TYPE 12:1 Figure 1 Figure 2 ALLY-OPERATED STRAIGHT AND ANGLE VALVES (TYPE PV) Figure 1 depicts the construction of a straight valve with the disc fixed to the spindle. The construction of the actuator, disc and seat are identical in the single valve. The valves are two position valves (open/ closed). The disc is shaped to ensure gentle opening and closing of the valve, and thus gentle acceleration and deceleration of the fluid flow. The valve can be fitted in any position. Fluid can flow from the lower or upper side of the disc, if the actuator is able to: Open the valve, using 6-7 bar pressure, against the highest pressure that can occur on the upper side of the valve disc. Keep the valve closed, using the spring force,against the highest pressure that can occur on the lower side of the valve disc. Figure 2 shows the construction of the disc, including the check valve function. (Construction of all other elements as in Figure 1). A valve with a check valve function must be fitted with the actuator upright. Free flow is possible only from the lower side of the disc. If back flow tends to take place after the valve is opened, the disc, which moves longitudinally on the spindle, will close in the flow path. Actuator size Air consumption per stroke(l) The air consumption of the actuators at 6 bar pressure is given in the adjoning table in litres free air/stroke. Actuators are equipped with a device for opening the valves manually. The dimensions of the valve actuator assemblies, as well as the pressure available are listed in Table 1. Figure 3 ALLY-OPERATED ANGLE VALVES FOR BRANCH PIPING,INCLUDING AN ADAPTER FOR THE MAIN PIPE (TYPE R). Figure 3 shows the construction of the valve and actuator. The valve is a two-position valve (open/ closed), which can be fitted in any position. Fluid can flow from the lower or upper side of the disc, if the actuator is able to: Open the valve, using 6-7 bar pressure, against the highest pressure that can occur on the upper side of the valve disc. Keep the valve closed, using the spring force, against the highest pressure that can occur on th lower side of the valve disc. The valve is available with a check valve function. In this case, the valve must be fitted with the actuator facing downward. Free flow is only possible from the branch pipe to the main pipe. The actuator is equipped with a device for opening the valve manually. The consumption of the actuators at 6 bar air pressure is expressed in litres free air/ stroke, or 3.5 l for a size 3 actuator and 10 l for a size 5 actuator. The dimensions of the valve/actuator/ adapter assemblies are listed in Table 2. Other types of adapters are also available.

2 Table 1 / Type PV DN Actuator size ød L L1 H Fixed disk type Pressure bar H1 1) 2) P 1 P 2 H Check valve function H1 Pressure bar ) P 2 2) S & FLAP VALVES TYPE 12: ) ) ) 1) P 1 Is the maximum pressure on the upper side of the disc, against which the actuators can open the valve at 6 bar air pressure. The pressure on the lower side of disc is assumed to be zero. 2) P 2 is the maximum pressure on the lower side of the disc, against which the springs in the actuator are capable of keeping the valve closed. The pressure on the upper side of the disc is assumed to be zero. 3) At 7 bar air pressure

3 S & FLAP VALVES TYPE 12:1

4 Ref No: Part Fixed cone Quant./Valve Non return cone Material 3 Cylinder 1 1 Cast Iron 5 O-Shaped Snap Ring 1 1 Spring Bronze 6 Cylinder Cover 1 1 Cast Iron 7 Bushing 1 1 Brass 8 O-Ring 2 2 Synthetic Rubber 9 Bolt 4 4 Steel 10 Stud Bolt 4 4 Steel 11 Nut 4 4 Steel 12 Plug 1 1 Brass 13 Throttle Piece * 1 1 Brass 14 Filter * 2 2 Brass 15 Pipe Fitting * 1 1 Steel 16 Air Vent Label 1 1 Al. Oxidized 18 Rivet 2 2 Brass 19 Pipe Fitting * 1 1 Brass 20 Spindle 1 1 Stainless Steel 21 Sliding Bushing 1 1 Steel 22 Stop Bushing 1 1 Steel 23 Stop Ring 1 1 Steel 24 Spring 1 1 Spring Steel 25 Ball Ring 1 1 Steel 26 Steel Ball 11/15/17 11/15/17 Steel 27 Slotted Screw 4 4 Steel 28 Operating Bushing 1 1 Steel 29 Nut 1 1 Steel 30 Locking Screw 1 1 Steel 31 Piston 1 1 Steel 32 O-Ring 1 1 Synthetic Rubber 33 Washer 1 1 Steel 34 Ball Bearing 1 1 Steel 35 Snap Ring 1 ½ Steel 36 Comp. Spring 1 1 Spring Steel 37 Comp. Spring 1 1 Spring Steel 38 Comp. Spring 1 1 Spring Steel 39 Comp. Spring 1 1 Spring Steel 41 Stop Ring - 1 Steel 42 Spring Disc 1 1 Steel 43 Snap Ring 1 1 Steel 44 O-Shaped Snap Ring 1 1/2 Spring Bronze 45 Lid Fixing Screw 1 - Brass 46 Locking Washer 1 - Brass 47 Split Ring 1 - Stainless Steel 48 Bottom Ring 1 1 Brass S & FLAP VALVES TYPE 12:1 * Parts with Ref No: 13, and 19 only delivered together as one kit.

5 S & FLAP VALVES TYPE 12:1 Ref No: Part Fixed cone Quant./Valve Non return cone Material 49 Box Gland 1 1 Bronze 50 Packing 4 4 Grafoil Ribb. Pack 51 Stud Bolt 2 2 Stainless Steel 52 Nut 2 2 Brass 81 Valve Body 1 1 Cast Iron/ Steel/ Bronze 82 Seat 1 1 Bronze 83 Cone 1 1 Bronze 86 Body Cover 1 1 Cast Iron/ Steel/ Bronze 87 Gasket 4/8 4/8/10 Steel 89 Nut 4/8 4/8/10 Steel 53 Lever Mechanism 1 (Optional) Aluminum 54 Pneumatic Position Indicator 1 (optional) - 60 Lever Mechanism 1 (optional) Aluminum 63 Electric Position Indicator 1 (optional) -

GW MK3 DELUGE VALVE HYDRAULIC & PNEUMATIC SPARES 100mm (4 ) 150mm (6 ) 200mm (8 )

GW MK3 DELUGE VALVE HYDRAULIC & PNEUMATIC SPARES 100mm (4 ) 150mm (6 ) 200mm (8 ) 25 46 22 29 26 17 27 24 35 23 33 34 2 39 12 13 9 6 36 15 4 37 14 EXTERNAL RESET 32 31 16 8 29 28 30 48 49 22 21 5 18 44 11 10 19 20 47 3 7 38 16 22 7 46 HYDRAULIC VALVE SERVICE PARTS: ITEM DESCRIPTION