A method for interconnecting components of a hydraulic fracturing system using flexible hose or pipe. The flexible hose or pipe can form a singular flow line which interconnects, for example, a pump and a manifold of the hydraulic fracturing system. Each end of the flexible hose or pipe can be tethered (using a safety restraint) to another component of the hydraulic fracturing system. In the event of a rupture or other failure, the safety restraint retains the tethered flexible pipes or hoses in a fixed position to prevent injury to personnel or damage to surrounding equipment.

A natural gas pumping system that includes six reciprocating compressor cylinders, the reciprocating pistons of the six compressors having cycles offset by 60 degrees one from another.

A refrigerant compressor for a refrigeration system comprises a common housing, a compressor unit arranged in the common housing, a mechanical compressor drive unit for the compressor unit, arranged in a drive chamber, a lubricant bath forming in the drive chamber, an intake duct that extends in a manner separated from the drive chamber and through which the compressor unit draws in by suction refrigerant that is to be compressed. The intake duct and the drive chamber are connected by a gas equaliser duct, which allows a permanent equalisation of gas, and which has on one side an opening on the drive chamber side and on the other an opening on the intake side, and of which the duct length between the openings corresponds to at least twice an equivalent duct diameter, in particular a smallest equivalent duct diameter, of the gas equaliser duct.

A vacuum operated object lifting system is disclosed that can use air pressure differentials to anchor the lifting system to the floor or other structure. The vacuum lifting system includes a main structure having a space defined in the bottom thereof and a lifting arm system extending from the main structure for grasping and moving a load. The vacuum lifting system includes a vacuum pumping system including an air pump and a conduit system extending from the air pump to the space in the bottom of the main structure. Use of the air pump to draw air out of the conduit system creates pressure differential between ambient air pressure and air pressure in the space of the main structure to anchor the vacuum lifting system to the ground. The vacuum pumping system may also grasp the load by suction.

A reciprocating compressor includes a compressor cylinder defining a cylinder wall, a valve bore formed in the cylinder wall, and a compressor valve assembly arranged in the compressor cylinder. The compressor valve assembly includes a valve liner having a liner body and a liner flange disposed at an end of the liner body. The liner body is disposed in the valve bore. The liner flange is positioned in contact with the compressor cylinder. A valve seat is coupled to an inner surface of the liner body. The valve seat has a seating surface formed at an end of the valve seat. A compressor valve is positioned on the seating surface of the valve seat. A valve cage is positioned on the compressor valve. A valve cover is coupled to the valve cage to apply a bias force to retain the compressor valve on the seating surface of the valve seat.

A method of using a device of inflating and repairing a broken tire contains a step of: placing the device on a ground. The device contains: an accommodation box, a sealant can, a cap, and at least one delivery hose. The accommodation box accommodates an air compressor for compressing airs so as to produce compressed airs. The accommodation box includes a first coupling orifice and a second coupling orifice. The sealant can includes a body in which sealant is received, and the cap is connected on an open end of the body. The cap includes an air inflow tube and a sealant supply tube), and the cap is engaged on the first coupling orifice or the second coupling orifice. The at least one delivery hose includes a first connector and a second connector connected with two components, thus inflating and repairing the broken tire diversely.

An inflating device includes an air pump, a valve engaging head, and a pushing apparatus disposed on the air pump and selectively engaging and disengaging the valve engaging head. The valve engaging head includes a main body, a connection assembly coupled to the main body and having a connection hole for a Presta valve and another connection hole for a Schrader valve, and a valve seat movably disposed in the main body. The connection assembly has a receiving hole and the valve seat is movably disposed in the receiving hole. The pushing apparatus selectively contacts and disengages from the connection assembly. The pushing apparatus has a pushing portion adapted to drive the valve seat. The pushing apparatus engaging the valve engaging head includes the pushing portion pushing the first abutting portion, thereby driving the valve seat toward the second connection hole.

A single-arm micro air-pressure pump device, having an air pump body and a driving unit. The air pump body includes a supporting frame, an air chamber unit coupled to a side of the supporting frame, and a swing arm provided on the air chamber unit. The driving unit is fixed on the supporting frame and has an output shaft. The output shaft is provided with an eccentric shaft and is configured to rotate the eccentric shaft, and the eccentric shaft has an end coupled to the output shaft and an opposite end coupled to the swing arm in order to drive the swing arm into a reciprocating motion between at least a proximal position and a distal position with respect to the air chamber unit. The reciprocating motion pushes a piston unit provided on one end of the swing arm and causes the air output.

A compressor comprises a first cylinder for compressing a fluid and a second cylinder for driving a piston in the first cylinder. The first cylinder comprises a chamber with first and second ends. The piston is reciprocally movable along an axial direction of the chamber for compressing a fluid. Three or more first ports at the first end include at least one first inlet port and at least one first outlet port. Three or more second ports at the second end include at least one second inlet port and at least one second outlet port. Each port has an axial direction parallel to the axial direction of the chamber. A check valve is connected inline with each port along the axial direction of the port.

A module for a vacuum pumping and/or abatement system. The module comprises a frame defining a space, a plurality of facilities inputs configured to receive facilities from a facilities supply, a plurality of facilities outputs configured to output the received facilities out of the module, and a plurality of facilities connection lines located at least partially within the space defined by the frame. The plurality of facilities connection lines connect the facilities inputs to the facilities outputs. The module further comprises a controller configured to control supply of facilities received at the facilities inputs out of the facilities outputs; and control operation of one or more vacuum pumping and/or abatement apparatuses remote from the module.