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stainless steel fitting
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SAE Flang H.T. Description:the marerial is 45 carbon steel. PFS is our 6000PSI hydraulic flange part no .
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SAE Flange L.T Description: the marerial is 45 carbon steel.P87311 is supplied as our 3000PSI hydraulic flanges.
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SAE Flange L.T Description: the marerial is 45 carbon steel. P87391 is supplied as our 3000PSI hydraulic flanges.
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SAE Flang H.T. Description:the marerial is 45 carbon steel. P87611 is our 6000PSI hydraulic flange part no .
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SAE Flang H.T. Description:the marerial is 45 carbon steel. P87641 is our 6000PSI hydraulic flange part no .
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Retaled "stainless steel fitting" Keywords
the valve block classification

1, according to the institutional forms pump device, the installation location can be divided into:

1) SRE Vertical: Vertical pump device mounted on the tank cover, mainly for the quantitative pump system.

2) SRE Horizontal: Horizontal pump device mounted on the tank cover, mainly for the variable displacement pump system in order to regulate the flow.

3) side-mounted: pump device horizontally mounted beside the tank on an individual basis, can be equipped with side-mounted spare pump is mainly used for fuel tank capacity 250 liters, motor power 7.5 kW system.

2, according to the cooling station can be divided into:

1) Natural cooling: by the tank itself and the air-cooled heat exchanger, generally used for fuel tank capacity of less than 250 liters of the system.

2) Forced cooling: Take cooler forced cooling, generally used for fuel tank capacity greater than 250 liters of the system. Hydraulic station with fuel storage tank level and the effective motor power as the main technical parameters. Fuel tank capacity total of 18 kinds of specifications (Unit: L / L): 25,40,63,100,160,250,400,630,800,1000,1250,1600,2000,2500,3200, 4000,5000,6000 this Series hydraulic station according to user requirements and the conditions of use in accordance with conditions that can be done: ① Press the System Configuration manifold, or not with the manifold; ② can be set coolers, heaters, accumulators; ③ can be set to the electrical control equipment, or not with electrical control devices.

3, according to the tank can be divided into:

A) ordinary steel: Box with 5MM-6MM steel welding, steel panel with 10-12MM, may be appropriate if the hole too thick or add ribs.

2) Stainless steel: 304 stainless steel cabinet selection, thickness 2-3MM,jic hydraulic fittings  the panel is made of 304 stainless steel plate thickness 3-5MM, increased load-bearing parts of the ribs.

3) ordinary steel tank internal rust treatment difficult to achieve, rust into the oil circulation system will cause a lot of trouble, all-stainless steel fuel tank is designed to solve the industry's problems.

4, according to the structure of the cylinder used can be divided into:

1) Piston

Single rod hydraulic cylinder piston rod at one end only. As shown is a single-cylinder piston. Import and export of its ends ports A and B can pass pressure oil or oil return, in order to achieve two-way movement, so called double-acting cylinder.

2) Piston ① plunger hydraulic cylinder is a single-acting hydraulic cylinders, hydraulic pressure can only be achieved by a direction of movement of the plunger or plunger return depends on the weight of other external forces; ② rely cylinder plunger not in contact with the cylinder liner support, so easy processing cylinder, the hydraulic cylinder suitable for making a long stroke; ③ total piston working pressure, so it must have sufficient rigidity; ④ often large piston weight, placed horizontally easy due to weight and drooping, causing unilateral seals and guide wear, so the vertical use of more favorable.

3) telescopic

 Telescopic hydraulic cylinder piston having two or more stages, telescopic hydraulic cylinder piston out of style in descending order, and the order load retracted it is generally small to large. Telescopic cylinders can achieve a longer stroke, the retracted length is short, more compact structure. Such cylinders commonly used in construction machinery and agricultural machinery.

4) Swing

Swing is the output torque of the hydraulic bolt cylinder and achieve reciprocating actuator, also known as swing-type hydraulic motors. A single blade and double blade forms. A stator fixed to the cylinder block, while the blades and the rotor are connected together. According to the inlet direction, will drive the rotor blades for reciprocating swing.

flange gasket

Gasket to produce a plastic deformation, and has a ring made of a material strength. Most gasket is cut down from the non-metallic plate, or as required by professional factory sized.
Gasket to produce a plastic deformation, and has a ring made of a material strength. Most gasket is cut down from the non-metallic plate, or as required by professional factory sized, the material is asbestos rubber sheet, asbestos sheet, PTFE sheet, polyethylene sheet, etc.; also useful for sheet metal (tin, stainless steel) will be non-metallic materials such as asbestos wrapped package made of metal gasket; there is a thin strip along with asbestos tape winding made of spiral wound gasket. Ordinary rubber gasket suitable for temperatures below 120 ℃ occasions; asbestos rubber gasket suitable for steam temperature below 450 ℃, the oil temperature is lower than 350 ℃, pressure less than 5MPa occasions, for general corrosion media, the most commonly used acid asbestos. In the high-pressure equipment and piping, the use of copper, aluminum and 10, steel, stainless steel or other type of lens made of shaped metal gasket. High surface contact with the sealing gasket width is very narrow (line contact), processing of the gasket sealing surface with a high finish. Rubber flange gaskets rubber split flanges  gasket
Small-diameter wire pressure flange, high pressure and low pressure large diameter welded stainless steel flange  are used, different pressures and the thickness of the flange diameter and the number of connecting bolts are different.

The latest technology: How to passivation of stainless steel parts
The critical surface should be facing upwards, but with the vertical direction at 15 to 20 degree angle so that the

moisture escape. Properly passivated materials, hardly any rust, although it will display some minor blemishes.

Hard austenitic stainless steel, can also be used to evaluate the humidity test. During this test, the sample surface

there should be water droplets, to expose the free iron by the presence of any corrosion.

ASTM A380 stainless steel parts, equipment and systems cleaning, you can use a faster way to go to a solution of the

oxide coating and passivation standard practice. The tests include parts cleaning, copper sulfide / sulfuric acid solution

to maintain humidity for 6 minutes to observe if there are any traces of the copper. As an alternative election method, the

part immersed in the solution for 6 minutes. If the iron was dissolved copper phenomenon. The test should not be use

for food processing on the part surface. In addition, the test should not be used to martensite or 400 series of low-

chromium ferritic stainless steel fitting, since there may be a false-positive results.

Before, as well as 95 ° F (35 ° C) temperature, 5% salt spray tests to evaluate passivated samples. The experiment is

too harsh for some grades of stainless steel, are not normally required to confirm the effective passivation.


During passivation, we must first of all cleaning to remove all oxide particles or heat tint.

Must be avoided that may cause a risk of rapid corrosion reaction of excess chloride. Possible, only the chloride content

of water less than 50ppm. The water is usually sufficient, in some cases, the chloride for a few hundred ppm.

Periodic replacement of the acid bath, in order to avoid likely to result in rapid corrosion reaction and passivation ability

of the damaged parts to reduce the phenomenon. Acid bath should be maintained at the proper temperature may

cause a local chemical reaction, because the temperature is out of control.

The case of higher production volume, the replacement of the solution to maintain the specified schedule in order to

reduce the possibility of contamination. Use control samples to test the effectiveness of the acid bath. If the sample is a

chemical reaction, will have to replace the acid bath.

Only with certain machine tools to manufacture stainless steel; to use the same coolant to the cutting of stainless steel,

and the exclusion of all other metals.

To separate the parts stacked for processing to avoid contact between the metal. This is to be free machining stainless

is very important because they need to use the passivation and the cleaning fluid escaping sulfide and corrosive

substances and avoid acid trap.

Do not passivation of stainless steel parts of the carbonation or nitrides. Because such parts, may be anti-corrosion

ability dropped to the degree of vulnerability to attack of the passivation bath.

Not particularly clean in the workshop environment, do not contain iron tool. Steel grit can be avoided through the use of

carbide or ceramic knives.

Do not forget, if improper heat treatment of parts, there may be a chemical reaction in the passivation bath. High-carbon,

high chromium martensitic stainless steel must be hardened to corrosion.

Subsequent annealing, the frequent use to maintain the temperature of the corrosion resistance to passivation.

Do not neglect the concentration of citric acid in the passivation bath. The concentration should be used can be

obtained from Carpenter, a simple titration procedure to regularly check.