See the following schematics and the “Equipment” section of the Viking Engineering and Design Data book for complete information regarding. 17, Please compare the page number, form number, date, and subject matter listed below with the pages in your Viking Engineering and Design Data Book. data pages behind the. “Proportioning Devices” tab in the. Viking. Foam. Design and. Engineering Data Book. 3. DISCHARGE DEVICES.
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Install t e deluge valve (C and trim in accordance it t e Viking Engineering and Design Data book. 3. Install t e proportioning device. Trim Charts are provided in trim packages and the Viking Engineering Design Data book. For optional factory assembled “modu- lar” trim. Issue. D. VIKING ENGINEERING DATA The only limiting factor to peak performance in a Viking Pump, as with all rotary Notice how the gear design of.
DO NOT connect the outlet of the drip check to any other drain. The priming line must be connected upstream of the system water supply main control valve or to a constant source of water at a pressure equal to the system water supply. After the deluge valve is set, operation of the deluge valve requires the release of priming water from the priming chamber.
This may be by automatic or manual operation of the release system. Viking Deluge valves are compatible with hydraulic, pneumatic, and electric release systems. For specific trim arrangements, refer to Trim Charts and System Data describing the system being installed.
Trim Charts are printed in the Viking Engineering and Design Data book and are provided with trim packages. Hydraulic Release Systems - See Graphs A through C for the maximum allowable elevation of hydraulic release piping above the deluge valve.
If the maximum height of hydraulic release piping exceeds the limit shown in Graph A, B, or C for the valve used, use a pneumatic or electric release system.
Pneumatic Release Systems - A Viking Pneumatic Actuator is required between the release system connection provided on deluge valve trim and pneumatic release system piping. Verify: a.
The system has been properly drained. Auxiliary Drain B. The Emergency Release B. For Systems equipped with: a.
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Open Priming Valve B. Allow the hydraulic release system to fill. When priming pressure gauge B. Pneumatic Release Systems: i.
Set the release system. Proceed to step 3. Electric Release Systems: i. Set the electric release system. Open Flow Test Valve B. When full flow develops from the Flow Test Valve B. Verify that there is no flow from the open auxiliary drain B.
Close auxiliary drain B. Verify that the Alarm Shut-off Valve B. Depress the plunger of Drip Check B.
No water should flow from the Drip Check B. Check for and repair all leaks. On new installations, those systems that have been placed out of service or where new equipment has been installed, trip test the system to verify that all equipment functions properly.
The inlet chamber and outlet chamber are separated from the priming chamber by the clapper 6 and diaphragm rubber 2. In the set condition: System pressure is supplied to the priming chamber through a restricted priming line trim equipped with a check valve.
System water supply pressure trapped in the priming chamber holds the clapper 6 on seat 9 due to area differential design. Clapper 6 separates the inlet chamber from the outlet chamber, keeping the outlet chamber and system piping dry. In fire conditions: When the release system operates, pressure is released from the priming chamber faster than it is supplied through the restricted priming line.
Water supply pressure in the inlet chamber, forces the clapper 6 off from seat 9 , allowing water to flow through the outlet and into the system and alarm devices. The deluge valve can only be reset after the system is taken out of service, and the outlet chamber of the deluge valve and associated trim piping is depressurized and drained.
Inspection It is imperative that the system be inspected and tested on a regular basis. The frequency of the inspections may vary due to con- taminated water supplies, corrosive water supplies, or corrosive atmospheres. Also, the alarm devices, detection systems, or other connected trim may require a more frequent schedule. For minimum maintenance and inspection requirements, refer NFPA In ad- dition, the Authority Having Jurisdiction may have additional maintenance, testing, and inspection requirements that must be followed.
The following recommendations are minimum requirements. For additional information, refer to Viking Trim Charts and System Data describing systems with the release system used. Weekly: Weekly visual inspection of the Viking Deluge Valve is recommended. If detected, perform maintenance as required. If neces- sary, replace the device. Verify that the valve and trim are adequately heated and protected from freezing and physical damage. Tests Quarterly: Quarterly testing of water flow alarms and performance of a Main Drain Test is recommended and may be required by the Authority Having Jurisdiction.
Viking Engineering LC
Water Flow Alarm Test 1. Notify the Authority Having Jurisdiction and those in the area affected by the test. Electric alarm pressure switches if provided should activate. Electric local alarms should be audible. The local water motor gong should be audible. If equipped with remote station alarm signaling devices, verify that alarm signals were received. All local alarms stop sounding and alarm panels if provided reset.
All remote station alarms reset. Supply piping to water motor alarm properly drains. Verify that the outlet chamber is free of water. Notify the Authority Having Jurisdiction and those in the affected area that testing is complete.
Viking Model e1
II: Main Drain Test 1. Record pressure reading from the water supply pressure gauge B. Verify that the outlet chamber of the deluge valve is free of water. Propulsion[ edit ] Propulsion for deorbit was provided by the monopropellant hydrazine N2H4 , through a rocket with 12 nozzles arranged in four clusters of three that provided 32 newtons 7.
These nozzles also acted as the control thrusters for translation and rotation of the lander. Terminal descent after use of a parachute and landing utilized three one affixed on each long side of the base, separated by degrees monopropellant hydrazine engines.
The hydrazine was purified in order to prevent contamination of the Martian surface with Earth microbes. Control was achieved through the use of an inertial reference unit , four gyros , a radar altimeter , a terminal descent and landing radar , and the control thrusters. Power[ edit ] Power was provided by two radioisotope thermoelectric generator RTG units containing plutonium affixed to opposite sides of the lander base and covered by wind screens.
Four wet cell sealed nickel-cadmium 8 Ah 28, coulombs , 28 volt rechargeable batteries were also on board to handle peak power loads. Payload[ edit ] Image from Mars taken by the Viking 2 lander Communications were accomplished through a watt S-band transmitter using two traveling-wave tubes.
A two-axis steerable high-gain parabolic antenna was mounted on a boom near one edge of the lander base. An omnidirectional low-gain S-band antenna also extended from the base. Both these antennae allowed for communication directly with the Earth, permitting Viking 1 to continue to work long after both orbiters had failed. Data storage was on a Mbit tape recorder, and the lander computer had a word memory for command instructions. The lander carried instruments to achieve the primary scientific objectives of the lander mission: to study the biology , chemical composition organic and inorganic , meteorology , seismology , magnetic properties, appearance, and physical properties of the Martian surface and atmosphere.
Two degree cylindrical scan cameras were mounted near one long side of the base. From the center of this side extended the sampler arm, with a collector head, temperature sensor , and magnet on the end.
A meteorology boom, holding temperature, wind direction, and wind velocity sensors extended out and up from the top of one of the lander legs.
A seismometer , magnet and camera test targets , and magnifying mirror are mounted opposite the cameras, near the high-gain antenna. An interior environmentally controlled compartment held the biology experiment and the gas chromatograph mass spectrometer.
The X-ray fluorescence spectrometer was also mounted within the structure. A pressure sensor was attached under the lander body. Main article: Viking biological experiments The Viking landers conducted biological experiments designed to detect life in the Martian soil if it existed with experiments designed by three separate teams, under the direction of chief scientist Gerald Soffen of NASA.If deterioration of the water supply is detected, take appropriate steps to restore adequate water supply.
Responsibilities: Develop and maintain project schedules including program plans that identify work scope, schedules, milestones, tasks, priorities, risks. For piping with grooved connections, the valve may be installed with listed grooved couplings of the appropriate pressure rating.
NOTE: It is normally not possible to modify the components of the system controls or their interrelation without compromising the listing. Hydraulic Release Systems - See Graphs A through C for the maximum allowable elevation of hydraulic release piping above the deluge valve.
Water flow alarms should operate.
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