Considering that valves may still be new to many people, we provide ten common questions and answers about valves for you to get started.
1. Pool Equipment Life Span (Part 2)
Part 2: This post will focus on the pool filter and finish up the last main item of the equipment pad. Later I will discuss the life spans of ancillary pool equipment like heaters, timers, valves, and automation. Pool Filters Most residential pool filters are pressure vessels designed to handle water pressure and house filtering elements to clean your pool water. Yes, I know a few of you out there still have in deck suction side DE filters but those are very rare at this point. Anyway, your filter housing sometimes called the "filter tank body," should last at least 10 years unless your pool equipment gets an inordinate amount of sunlight which can warp and weaken modern plastic pool filter housings. With proper preventative maintenance, the non wear out parts of a filter should last between 5-10 years as well- these include the band clamps, the internal grids, and plumbing including valves. The wear out parts- O rings, gauges, air relief systems, and Cartridge filter elements all need to be checked annually. Safety It is vital to make sure your air relief system works properly - this is a big safety issue. Pool Filters are designed to handle water pressure, water does not compress. They are not made to handle air pressure- air compresses very well and can build up to pressures no pool system is designed for. If you forget to bleed off the air after you clean your filter, this can cause a dangerous situation if your filter's internal air bleed off and pressure relief valves are not intact and properly functioning. Please get a licensed pool professional to make sure yours is and never open a pool filter with the system and until you have opened the pressure relief valve and are sure the system is not under pressure. Never let inexperienced people perform this task. Sorry off topic on my safety soapbox. Okay, so we know the useful life spans of the Pool Pump and Pool Motor (part 1) and the Pool Filter. If you have any questions or want help with keeping this equipment up to speed in terms of preventative maintenance, please call us today to schedule your Spring Special, a sale we run annually in the spring to help your pool operate at its best and your equipment last as long as possible.
2. LINUO Ball Valves
A segment ball valve combines globe valve control with the efficiency of a rotary ball valve. Features: Economical metal seated valve for industrial service. Great for slurry service or for other dirty media. Simensions to ASME b16.5 for flanges, b16.10 for face to face. For service up to 1000 deg. F, 1400 psig. Features: Available in cs and ss Economical soft seated valve for industrial service. direct mount for simple automation. Square stem means no bracket or coupler required! bi-directional shutoff to class vi. for service up to 450 deg. F, 1000 psig. Features: Available in CS and SS Designed per API 6D and fire tested, it is suitable for various applications in the oil and gas industry. Special configurations for low temperature or high temperature applications are available. Features: A segment ball valve combines globe valve control with the efficiency of a rotary ball valve.Economical metal seated valve for industrial service.Great for slurry service or for other dirty media. Simensions to ASME b16.5 for flanges, b16.10 for face to face. For service up to 1000 deg. F, 1400 psig.Economical soft seated valve for industrial service. direct mount for simple automation. Square stem means no bracket or coupler required! bi-directional shutoff to class vi. for service up to 450 deg. F, 1000 psig.Designed per API 6D and fire tested, it is suitable for various applications in the oil and gas industry. Special configurations for low temperature or high temperature applications are available.
3. Consolidated 1700 Series MaxiflowÂ® Safety Valves - How SAFE is SAFE
Consolidated safety valves have been the industry leader since 1879. The Consolidated Maxiflow 1700 series valve continues to be synonymous with the protection of life and property from boiler over pressurization. With set pressures ranging to 5360 psig (369 bar) and temperatures up to 1120F (604C), this workhorse safety valve is installed on the majority of power generating stations worldwide. There is little doubt that the Consolidated Maxiflow was built for safety and to indeed protect both life and property, in that order. With a valve of this sophistication, the question now is how to ensure that improper maintenance does not diminish the functionality of this outstanding valve. Indeed, GE (Dresser, Inc.) goes to great lengths to extensively train and certify qualified Green Tag Center (GTC) service valve technicians in the intricacies of the Maxiflow and the various internal adjustments that must be made. Unique design features of the Maxiflow 1700 series valve assure maximum relieving capacities, adjustable lift, stable set pressures, accurate and repeatable blowdown (one of the shortest in the industry), and consistent seat tightness often exceeding 95% of set pressure. Each of these features provide benefits to the user in terms of closer operating pressure (narrow operating gap), shorter blowdown (closing pressure), and fine-tuned capacities (adjustable lift) to prevent chatter. Unfortunately, misadjustment of even one of these unique settings can have disastrous consequences. Seat tightness is the hallmark of the Maxiflow and is accomplished by utilizing a highly engineered THERMODISC in conjunction with a special DISC COLLAR. The Thermodisc has a flexible lip seat area that allows for temperature equalization and the use of system pressure to assist in achieving a leak tight seal. Control of the amount of disc tilt is accomplished by the Maxiflow's unique disc collar. Careful adjustment of this part (per factory specifications) ensures proper valve performance, while improper adjustment will result in seat leakage and the destruction of the critical Thermodisc. Too much disc "rock"(play/wiggle) and disc misalignment can occur; too little and the disc assembly becomes rigid and loses its ability to perform. The most critical function of any safety valve is to open at the appropriate set pressure and to relieve its required capacity (at full lift) to prevent system overpressure. Valves must not relieve significantly more capacity than is required or the valve will chatter and suffer significant mechanical damage or worse. The Maxiflow has the feature to allow for actually reducing the rated capacity in a given valve by RESTRICTING THE LIFT as allowed by ASME code. This is especially useful when a selected valve has significantly more capacity than is needed and a smaller valve will not work. The adjustment that controls the restricted lift function in the Maxiflow is the LIFT STOP. This CRITICAL part (lift stop) dictates whether the valve will flow its FULL CAPACITY or only FRACTIONAL CAPACITY; it can even be misadjusted to flow NO CAPACITY at all. It is vital that only qualified individuals such as GE's Green Tag Center service technicians make this critical adjustment; the consequences of a misadjustment could be catastrophic. The Maxiflow also uses a very special technique called PRESSURE ASSISTED CLOSING to achieve the tightest and most accurate blowdown (closing pressure) of any valve in the industry. These valves can consistently achieve closing pressures (blowdown) at 3% below the set pressure; significantly tighter than that required by ASME Code Section I. In addition to the traditional upper and lower blowdown adjusting rings found in many valves, the Maxiflow utilizes a third ring called an OVERLAP COLLAR. The overlap collar works in conjunction with other parts (floating washers and top plate assembly) to control how system pressure (when valve is open and flowing) can be used to assist the valve in reseating. The proper position of this overlap collar is critical to valve performance; too high and the reseating feature is NEGATED, too low and the valve will CHATTER. Inexperienced valve technicians may believe that "the shorter the blowdown the better" and will intentionally misadjust the valve to achieve a much too short blowdown which can result in chatter and reduced capacity. GE thoroughly trains and certifies Green Tag Center service technicians on the proper methods/settings to use when adjusting the Maxiflow overlap collar to ensure proper valve performance. It is a highly engineered device that requires extreme care during the repair and adjustment of its critical components. It is very easy to make incorrect adjustments that, at best, hinder its performance and, at worst, can cause it to not perform at all. Consider utilizing only GE factory trained and certified GTC technicians to perform this work, because after all, how SAFE is SAFE?
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