摘要:
A method for injecting a fluid into an oil and or gas reservoir or formation, in which the fluid flows into the reservoir or formation through a plurality of autonomous valves or flow control devices (2) provided along an injector (24), the valves (2) having a substantially constant flow-through volume above a given differential pressure for autonomously adjusting the flow of the fluid in order to ensure a substantially constant volume rate from the injector (24) to the reservoir or formation along an injector length.
摘要:
An improved airless paint spray pump having an intake (20), an inlet valve assembly (62), a pumping chamber (54, 56), an outlet, an outlet valve assembly, and stroke pumping means (42) for pumping the fluid paint into the pumping chamber through the intake during the intake stroke and through the outlet on the pumping stroke. The inlet valve assembly includes a flat valve (70) which cooperates with a valve seat (68) at the intake and is displaced from the valve seat during the intake stroke of the pumping means and is seated on the valve seat (68) during the pumping stroke of the pumping means. The flat inlet valve replaces the previous ball type inlet or check valve thereby expanding the design capabilities of the pump.
摘要:
The invention relates to a backflow preventer (1) comprising a valve member (6) in the interior (5) of the insertable housing (2) thereof. Said valve member (6) sealingly rests against a valve seat (7) in the closed position thereof while being movable from the closed position thereof into the open position thereof counter to a restoring force. The interior (5) of the housing is provided with an interior section (A) which has an interior cross section that is larger than the outer circumference of the valve member in the movement zone of the valve member (6). The aim of the invention is to prevent undesired noise from developing as a result of the valve member (6) vibrating on the inner circumference of the housing also when the quantity of penetrating medium is low. Said aim is achieved by providing at least the movement zone of the backflow preventer (1), which is located near the valve seat (7), with an elastic valve member guide (9) that is effective between the valve member (6) and the interior housing wall surrounding the interior section (A) so as to guide the valve member (6) free from play.
摘要:
An improved airless paint spray pump having an intake (20), an inlet valve assembly (62), a pumping chamber (54, 56), an outlet, an outlet valve assembly, and stroke pumping means (42) for pumping the fluid paint into the pumping chamber through the intake during the intake stroke and through the outlet on the pumping stroke. The inlet valve assembly includes a flat valve (70) which cooperates with a valve seat (68) at the intake and is displaced from the valve seat during the intake stroke of the pumping means and is seated on the valve seat (68) during the pumping stroke of the pumping means. The flat inlet valve replaces the previous ball type inlet or check valve thereby expanding the design capabilities of the pump.
摘要:
Mass transfer equipment comprises a base (3) having at least one riser (1) with inwardly and upwardly elongated sloping sides and a moveable valve cap (2) positioned above the riser (1), having outwardly and downwardly elongated sloping sides. Legs (5) extend downwardly from the valve cap (2) and possess stops which limit the movement of the valve cap (2) to such an extent that the lower edge of the sloping side of the valve cap (2) is never above the upper edge of the sloping side of the riser (1). Dimples (4) may be provided on the riser (1) to prevent sticking when the valve is closed.
摘要:
The device according to the invention consists of a hollow piston (57) displaceably mounted in a cylinder and a valve member (58) which is guided by the hollow piston (57) and mounted so as to be axially movable relative to the hollow piston (57). The valve member (58) is arranged at one end of the hollow piston (57) inside or immediately in front of the end of the hollow piston (57). The device is used in a mechanically operated high pressure atomiser. The valve (58) operates without any auxiliary force, closes very rapidly and is sealed tight against high pressure. The atomiser is used, for example, to produce an inhalable aerosol of a liquid medicament without the use of a propellant gas, at 320 bar, for example.
摘要:
The device according to the invention consists of a hollow piston (57) displaceably mounted in a cylinder and a valve member (58) which is guided by the hollow piston (57) and mounted so as to be axially movable relative to the hollow piston (57). The valve member (58) is arranged at one end of the hollow piston (57) inside or immediately in front of the end of the hollow piston (57). The device is used in a mechanically operated high pressure atomiser. The valve (58) operates without any auxiliary force, closes very rapidly and is sealed tight against high pressure. The atomiser is used, for example, to produce an inhalable aerosol of a liquid medicament without the use of a propellant gas, at 320 bar, for example.
摘要:
A miniaturised device for producing high pressure in a fluid imposes stringent requirements on the manufacturing process. The device according to the invention consists of a hollow piston (57) displaceably mounted in a cylinder and a valve member (58) which is guided by the hollow piston (57) and mounted so as to be axially movable relative to the hollow piston (57). The valve member (58) is arranged at one end of the hollow piston (57) inside or immediately in front of the end of the hollow piston (57). The device is used in a mechanically operated high pressure atomiser. This consists of a two-part housing which comprises a pump housing (52) with nozzle (54), a blocking mechanism (62), a spring housing (67) with spring (68), a non-pressurised storage container (71) for the fluid (72) and a mechanical counter integrated in the spring housing (67). The valve (58) operates without any auxiliary force, closes very rapidly and is sealed tight against high pressure. The atomiser is safe and simple to operate and environmentally friendly. The fluid is metered extremely accurately. The atomiser is used, for example, to produce an inhalable aerosol of a liquid medicament without the use of a propellant gas, at 320 bar, for example.
摘要:
A scroll type hermetic compressor (10) is disclosed which incorporates an improved disc type check valve (44) in the discharge conduit exiting from the compressor shell. The check valve operates to prevent return of high pressure refrigerant which may cause reverse movement of the orbiting scroll upon shut down of the compressor.