(1) Purpose : To test check valve No.1 for tightness.

(2) Lift off the first check valve cover.

(3) Particles from worn piston seal caught in check valve.

(4) Reassemble the Check valve modules.

(5) Media type check valve for preventing backflow.

(6) Reassemble the check valve module in the reverse order.

(7) This paper introduces a refluence protection system for check valve, it can enhance the using efficency of the airflow power.

(8) The cracking condition of hydraulically controlled check valve in locking circuit is studied via problems encountered in practice and a method for correct selection is presented.

(9) If the pump does not export loaded check valve, high pressure water will reverse back pumps, impeller pumps water at high pressure have a reverse impact.

(10) At the entrance to the water with check valve to prevent water at night by the collector current, and cause the heat loss.

(11) Seat discs shall be reversible to extend check valve life.

(12) Check valve is also called the reflux valve, non - return valve.

(13) A check valve may be required ahead of the backflow preventer.

(14) The check valve shall utilize single torsion spring design to minimize pressure drop through the assembly.

(15) A double check valve assembly shall be installed at each noted location.

(16) Double Check Valve Assembly shall be installed at each noted location.

(17) The Straight Sided Insert is a threadless check valve designed to be inserted into any cavity where a check valve is needed and threads are not desired.

(18) Watts Series 709 Double Check Valve may be installed in either a vertical or horizontal position.

(19) The movements of check valve located at Valve valve seal on the Butterfly valve seat surface.

(20) Test ports shall have internal check valve and be equipped with caps.

(21) Under the effect of check valve, synchronization phenomenon is caused in the process of water hammering in long distance pipelines.

(22) A built-in butterfly-shaped check valve for an insulating jacket serves heat insulating function.

(23) Lift check valve with a spring load can withstand light valve flap , flap valve lift is not high.

(24) Results show that simple structure aerovalves can be applied in PDE because it has both functions of check valve and air-blast atomizer.

(25) A leeward side of the box is provided with at least one air outlet having a vent check valve.

(26) Please refer to "Flow Calculations " in the Technical Data section for swing check valve flow coefficient (Cv) and equations to calculate pressure drop through the valve.

(27) The debris is prevented from flowing back out of the bailer by a check valve.

(28) The valve not only possesses the functions of ordinary check valve, but also allows the inclinometer to pass through it smoothly without affecting the deviational survey.

(29) Safety Valve, Ball Valve, Needle Valve, Y - Control Valve, Y Cylinder Valve, Check Valve Cock.

(30) Never reverse flow through a regulator or rely upon it to act as a check valve.

(31) The check valve plays an important role to prevent the reverse flow in high pressure system.

(32) This paper derives the characteristic formula of control pressure in hydro-control check valve and the mechanical characteristics formula of inlet and return circuit.

(33) Series 775 Double Check Valve Assemblies provide protection of the potable water supply for non - health hazard - connections .

(34) The cause of damage of screw type gasification blower due to vanes' reverse motion is analyzed. A check valve is designed and put at the outlet of the blower. Success is achieved.

(35) Close shutoff No. 1. Slowly open bleed "B" until differential gauge rises to 2 PSI and close. If the differential reading does not decrease, record check valve as "tight".

(36) Purpose : To test check valve No. 2 for tightness against reverse flow.

(37) Open VB to reestablish first check valve differential pressure. Close VB. Record pressure differential.

(38) The check valve and T-joint are designed into one, this simplifies the installation process and avoids to some troubles.

(39) Our company is special in the production and sales of Brass ball valve . Check valve.

(40) Open test cock No.1 and No.3 admitting line pressure to downstream side of second check valve.

(41) To avoid this discharge, install a spring-loaded check valve ahead of the backflow assembly to "lock - in" the downstream pressure.

(42) Purpose : To test check valve No.2 for tightness against flow.

(43) If the differential reading does not decrease record check valve as tight.

(44) Export pump with check valve, it will immediately turn off to prevent reverse flow back - pressure pump.

(45) The invention discloses a floor drain and a floor drain rubber check valve.

(46) The procreative blanking plug of the "Y type" pipe string has check valve function and it can conveniently for reverse circulation well cleanup.

(47) Casing gu can be recovered by installing a check valve between flow line and casing outlet of a oil well.

(48) Controlled closing of the valve, opens the mainline check valve, gradually increasing line pressure.

(49) Use a check valve to prevent reverse flow into the cylinder.

(50) In the open position, they function as a lift check valve.

(51) The check valve avoids refluence of air in pipe- lines and consequent pressure loss in which compressed air is intended to flow in one direction only.

(52) To avoid this discharge, install a spring-loaded rubber seated check valve ahead of the backflow assembly to "lock - in" the downstream pressure.