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The butterfly valve has been in use since the late 18th century. James Watt used a butterfly valve in his steam engine prototypes. With advances in material manufacturing and technology, butterfly valves could be made smaller and withstand more-extreme temperatures.
A relief valve DN25 on cooling water pipe from heat exchanger Schematic diagram of a conventional spring-loaded pressure relief valve. A relief valve or pressure relief valve (PRV) is a type of safety valve used to control or limit the pressure in a system; excessive pressure might otherwise build up and create a process upset, instrument or equipment failure, explosion, or fire.
A ball valve is a flow control device which uses a hollow, perforated, and pivoting ball to control fluid flowing through it. It is open when the hole through the middle of the ball is in line with the flow inlet, and closed when it is pivoted 90 degrees by the valve handle, blocking the flow. [1]
Produced under license by Bangladesh Ordnance Factories. [9] [12] Type 56: 7.62×39mm: Assault rifle Bangladesh China: Assembled locally at BOF [13] [9] Carbine; M4 Carbine: 5.56×45mm NATO: Selective fire carbine United States: Used by Special Forces [9] Zastava M59/66: 7.62×39mm: Semi-automatic carbine Yugoslavia: Mainly used to fire the M60 ...
Location of Bangladesh This is a list of butterflies of Bangladesh . About 430 species are known from Bangladesh, but it is estimated that a total number of 500 to 550 species occurs.
BD-08: BD-08 [9] and BD-08 MK-II with optical sight. It is the current standard-issue rifle of the Bangladesh Army and also used by Border Guard Bangladesh and other forces. It is a Bangladeshi variant of the Chinese Type 81 assault rifle. Type 56 assault rifle - Assembled locally. [10]
Silicone caulk can be used as a basic sealant against water and air penetration. In organosilicon and polymer chemistry, a silicone or polysiloxane is a polymer composed of repeating units of siloxane (−O−R 2 Si−O−SiR 2 −, where R = organic group).
Against the Soviet Union, the sFH 18 lacked the range of the Red Army 152 mm ML-20 gun-howitzer, its maximum range of 17.3 kilometres (18,900 yd) allowed it to fire counter-battery against the sFH 18 with a 4 kilometres (4,400 yd) advantage. This led to numerous efforts to introduce new guns with even better performance than the ML-20, while ...