1/2" 304 Stainless Steel Ball Valve WOG1000

This multi-purpose manual lever ball valve has excellent corrosion resistance and is fit for many applications. The valve is fitted with PTFE seals which also has great corrosion resistance. When using biodiesel: Stainless steel ball valves are ideal for biodiesel processors. Stainless steel has excellent corrosion resistance to biodiesel, methanol and lye. Use of stainless steel ensures a long-lasting processor. Ports: Female x Female NPT Threads Pressure Loss: Full size port: minimal pressure loss 1000 WOG Max 1000 psi for Water, Oil, Gas Fluid Medium: For use with liquids and gases Body & Ball Type 304 Stainless Steel Seal Type PTFE Temp Range: -60°F to 450°F Operation: Low Operation Torque Handle Heavy duty handle with blue vinly insulation

The Tank, Heavy Assault, Tortoise (A39) was a British heavy assault tank design developed in World War II but never put into mass production. It was developed for the task of clearing heavily fortified areas and as a result favoured armour protection over mobility. In the early part of 1943 the Allied forces anticipated considerable resistance in the projected future invasion of Europe, with the enemy fighting from heavily fortified positions such as the Siegfried Line. As a result, a new class of vehicles emerged, in the shape of assault tanks, which placed maximum armour protection at a higher priority than mobility. A Joint Memorandum in April 1943 gave a vague specification for an assault tank, classing it as a special-purpose vehicle to operate in heavily-defended areas as part of the specialist 79th Armoured Division. The Nuffield Organisation responded with 18 separate designs (AT1 through AT18) between May 43 and Feb 44, each design larger and heavier than the last. By Feb 44 design AT16 was complete and was approved by the Tank Board. An order for 25 was placed by the War Office and work was begun. Following the end of the war the order was reduced and only six were built. One was sent to Germany for trials where it was found to be mechanically reliable and a powerful and accurate gun platform, but at 78 tons and a height of 3m it was extremely slow and proved difficult to transport. In strict terms, since the Tortoise had a fixed superstructure instead of a turret, it should be classified as a self-propelled gun or an assault gun and not a tank. The seven crew included a commander, driver, and gunner, two loaders for the 32-pounder gun and two machine-gunners. Internally it was split into three compartments, the transmission to the front, the crew in the centre and the Rolls-Royce Meteor engine at the rear. The suspension consisted of four bogies on each side each of the hull. Each bogie had two pairs of wheels, with each pair linked to a transverse torsion bar. The Merritt-Brown transmission was fitted with an all-speed reverse, giving approximately the same speed backwards as forwards. The 32-pounder gun design was adapted from the British 3.75in AA gun. The ammunition used a separate charge and shell, the latter a 32 lb armour-piercing shot (APCBC). In tests the gun was successful against a German Panther tank at nearly 1,000 yards. The gun was mounted in a power-assisted limited traverse mounting; rather than being mounted on the more traditional trunnions, it protruded through a large ball mount in the front of the hull, protected by 225mm armour. To the left of it was a Besa machine gun in an armoured ball mount. A further two Besa machine guns were mounted in a turret on the top of the hull to the right. One of the six production Tortoises has been preserved at the Bovington Tank Museum in Bovington, UK and is seen above. It is in full running condition and this year it ran under its own power for the first time since the 1950s.

100 of this type were built for the Metropolitan Electric Tramways and London United Tramways in 1930-31 by the Union Construction Company of Feltham, Middlesex. Each car was fitted with two trolley poles, one for each direction of travel. This was necessary because of the great length of the car bodies - 40ft 6in over the fenders. The M.E.T. cars were fitted with plough carriers from the start, and the L.U.T. cars followed suit after the cars were absorbed into London transport in 1933. For most of their life in London, the entire class operated from Streatham depot. In 1951 they were sold to Leeds, wherre they ran until the closure of that system in 1959. Like my TD1 and 'Q' buses, the 'Feltham model is built to 1/16 full size - 3/4" to the foot, and runs on a representation of tramway track of 3 1/2" gague. Likewise, it is built from the contents of a 1959s Red/Green No.9 set. The size and detail of the model make great demands on the set, and apart from using, as usual, every Nut and Bolt, it incorporates every single Perforated Strip. It is mounted on two 'maximum traction' trucks with prototypical unequal diameter wheels, Bush Wheels and Wheel Discs forming the very prominent axle boxes, and Trunnions representing the magnetic track brakes. The model features the two unusual driving cabs, which were raised to provide a seated driver the same level of vision as drivers standing in earlier classes of car. Fittings in them include speeed controllers, air brake handles, handbrake wheels and drivers' seats. I hope to motorise it by scheming out a method of drive from the inboard E20R motor (which is mounted where the plough was fitted in the prototype). Other work to be done is the fitting of lifeguard gates, although the Braced Girder 'cowcathers' are in place. The prototype cars originally featured front exit air operated sliding doors, which were later sealed out of use. The main entrances were fitted with two-leaf doors which could be folded together and then slid back into a recess in the bodywork. I have modelled these as open one end, closed the other, but non-working. Prototype information was gained from 'London Trnapsort Tramways 1933-1952 by E.R. Oakley and C.E. Holland, published by the London Tramways History Group. Also a very fine scale drawing number LT/500 by F.J. Roche dated February 1948 was invaluable.