Drug Synthroid Online (Levothyroxine) is used for treating low thyroid hormone levels and certain types of goiters. Abilify (Aripiprazole) is used for treating agitation caused by schizophrenia or bipolar disorder, depression. Click to see full text here:

Artifact: Control Module, Oxygen and Hydrogen Service, Apollo Service Module, Block II

Bookmark and Share
Identifier: A20120042
Artifact Category: Spacecraft Hardware
Period of Employment: October 11 1968 to July 24 1975
Manufacturer: Parker-Hannifin
NASA Contract Number: NAS9-150
Spacecraft/Launch Systems: Apollo Service Module

Stainless Steel, Aluminum

Dimensions: 9 x 6 x 8 Inches
Weight: 9 Pounds (estimated)
Flight Vehicle System or Component: Cryogenic Transfer, Storage and Venting,Environmental Control (ECS)
Program: Apollo
Flown Status: Unflown

A System (Tank) Valve Module (Apollo Oxygen Hydrogen Service Module) manufactured by PARKER-HANNIFIN circa 1967-1971 used to provide overboard relief of elevated pressures within the stored LH2 (Liquid Hydrogen) and LO2 (Liquid Oxygen) tanks in the Apollo Command Service Module (CSM). This system also sensed LH2/LO2 tank pressures, regulated the tank heaters and controlled the tank destratification motors (motors used to execute the CRYO-STIR in the LOX/LH2 tanks for "slush" mitigation). The modules were in-line between the LH2/LO2 cryogenic tanks and the CSM Fuel Cells. The Systems (Tank) Valve Modules for the hydrogen and oxygen systems are functionally identical. Each module contains two relief valves, two pressure transducers, two pressure switches and one check valve.

The relief valves are a differential type designed to be unaffected by back pressure in the downstream plumbing, The valve has temperature compensation and a self-aligning valve seat. Relief crack pressure is 273 psig minimum for hydrogen tanks and 983 psig minimum for oxygen tanks. Full flow pressures (LO2) is 1010 psig (maximum) and for LH2 285 psig (maximum).

Module pressure switches are a double pole single throw absolute device. A positive reference pressure (less then atmospheric) is used to trim the mechanical trip mechanism to obtain the absolute switch actuation settings. Reference pressure is typically between 4 to 10 psia. The motor driven switch controls power to both the tank heaters and destratification motors.

The pressure transducers, are an absolute (vacuum reference) device. Each transducer consists of a silicon pickup comprised of four sensors mounted on a damped edge diaphragm and an integral signal conditioner. The unit senses tank pressure through the discharge line from the tank; signal conditioner output is 0-5 VDC analog output which is linearly proportioned to tank pressure.

The check valve, is designed to open at a differential pressure of approximately 1 psia. The single poppet is spring loaded and has a large area to prevent chattering during flow in the normal direction. This large area also helps in obtaining a positive seal if pressurized in the reverse direction.

Related Objects


Cheap Synthroid

Synthroid is especially important during competitions and for rapid muscle growth. No prescription needed when you buy Synthroid online here. This drug provides faster conversion of proteins, carbohydrates and fats for burning more calories per day.

Cheap Abilify

Abilify is used to treat the symptoms of psychotic conditions such as schizophrenia and bipolar I disorder (manic depression). Buy abilify online 10mg. Free samples abilify and fast & free delivery.


The best online shops in Italy: