A pressure Reducing Valve (PRV) takes a high pump pressure and regulates it to a usable building pressure regardless of the pumps flow between no flow and full rated flow. There are many brands of PRVs, each with its own quirks.

The pressure relief valve is a spring-supported valve that opens when the limit pressure is reached, thereby discharging excess air via the bypass. The pressure relief valve protects the side channel blower from overload. See similar questions...

By design a back pressure valve will prevent siphoning. It is not recommended to use a back pressure valve in such a fashion because they are not ³fail safe². If siphoning is a concern a siphon breaker should be installed in your system. Have another question you'd like to see featured on our Frequently Asked Questions page? Simply contact us today! See similar questions...

New in relevant terms with the conventional water heater, but our associate manufacturer has been manufacturing these products for the past eighteen years. However, the system for the the innovative SRC2 range of models was awarded U.S patent # 5408578 in 1995. See similar questions...

The Pneumadyne Pressure Control Valve is ideal for applications requiring reduced pressure to a cylinder. It is designed for use between a valve output and a cylinder or other volume, where a reduced pressure is desired. A high volume check valve is built in to allow for rapid reverse flow. It is also ideal for continuous flow applications where reverse flow is not required. Output pressure is selected by adjusting the control knob when pressure is off. See similar questions...

Whenever a silo is being filled by a pneumatic offloading system (pressure blower), high pressure is forcing material into the silo. The pressure safety valve, or "pop-off valve" will allow the pressure to escape preventing any additional damage. Top See similar questions...

Pressure-reducing equipment should be provided as soon as the patient is deemed to be at risk. Trolleys in A & E, and Operating Tables should therefore be used in conjunction with suitable pressure-reducing mattresses, in addition to the mattress on the patient's bed and cushion on their bedside chair. See similar questions...

It should allow the ischial tuberosities to be accommodated, thereby allowing the thighs to support the body weight. See similar questions...

A standard technology engine brake consists of a solenoid valve, control valve, and master and slave pistons. These components are assembled into a housing as shown below. When the brake is activated, the solenoid allows oil to pass to the control valve. The control valve moves up and the check ball in the control valve is unseated, allowing oil to fill the master/slave piston circuit. See similar questions...

The standard catalog 2-way ASCO valves are not designed to hold back pressure. Back pressure occurs the downstream pressure exceeds the inlet pressure. This may result in the inability of the valve to close. Consult the factory if you have a specific back-pressure requirement. Generally, ASCO valves cannot be changed from A/C to D/C or vice versa due to the difference in solenoid designs. Voltages can be changed within the same current type (e.g. See similar questions...

Insure tight contact between the valve face and the valve seat to seal the combustion chamber and provide proper heat transfer from the valve to the cylinder head. Keep the valve from bouncing on its return to the seat. If the valve bounces, cylinder pressure (power) is lost. Repeated bouncing of the valve is like a hammering action that can result in the head of the valve deforming ("tuliping") or actually breaking from the valve stem resulting in catastrophic engine failure. See similar questions...

Open pressure is the pressure against the retainer when the valve is at its maximum open point. Adequate open pressure is necessary to control the valve lifter as it first accelerates up the opening flank of the cam lobe and then quickly decelerates to pass over the nose of the cam which causes the valve to change direction. Inadequate open pressure will allow the lifter to "loft" or "jump" over the nose of the cam (referred to as "valve train separation", or "valve float"). See similar questions...

Pressure-reducing equipment aims to provide maximum support of the body surface area, thereby reducing interface pressures over bony prominences. Such equipment is normally referred to as static equipment. The Emerald mattress is a static visco elastic mattress. Pressure-relieving equipment aims to give pressure relief over small areas of the body at a time. This is achieved by inflating and deflating air cells alternately. This type of equipment is usually referred to as dynamic equipment. See similar questions...

Pressure Control valves are ideal for applications requiring a reduced pressure to a cylinder whereas Pressure Regulators are used to maintain a downstream settable pressure. See similar questions...

The Vortex® Valve is an automatic pressure relief valve that regulates air with changing altitude and temperature, while keeping water out. Storm Case pressure equalization vents (Vortex® valves) are the result of a unique molded housing and a special "Gortex" gas-permeable micro-porous membrane that can repel liquids and micro-particles while allowing gas (air) molecules to pass right through the membrane. See similar questions...

Pressure is the amount of force pushing the flow of water. It's measured in pounds per square inch (PSI) and can be easily measured with a low cost pressure gauge. Knowing your starting pressure helps determine whether or not you need a pressure regulator, but it's not essential in a simple backyard system. Regular household pressure is often around 50 PSI. See similar questions...

The spring valve of the Duromatic pressure cooker by Kuhn Rikon allows the user to know when the interior of the pan achieves pressure, allowing greater accuracy in the timing of cooking. When the first red ring appears, the internal pressure has been raised 8 pounds per square inch (psi) above the external pressure. When the second red ring appears, internal pressure has been raised 15 psi above the external pressure. See similar questions...

Yes, this is a multi-function fortifier designed to cling to metal parts, preventing dry starts, oxidation inhibitors that protect your oil at high temperatures, acid scavengers that protect metal from corrosive byproducts of combustion and a detergent package that prevents varnish build up on internal parts. See similar questions...

There are at two explanations for the positive effects of slow breathing on blood pressure. The first is a simple physiological response: Breathing slowly and deeply relaxes muscle tension, particularly in the chest area, which allows the blood vessels to open up and relieve pressure on the heart. Now there is a new theory proposed by Dr. David Anderson of the National Institute of Health that has less to do with relaxation. See similar questions...