#proportional valves

[pddparthi]

Unlocking Precision and Power: A Guide to Hydraulic Servo Actuators

Introduction: In the realm of automation and motion control, hydraulic servo actuators reign supreme for their unmatched blend of raw power and exceptional precision. These marvels of engineering combine the potent force of hydraulics with the meticulous control of electronic systems. This comprehensive guide delves into the world of hydraulic servo actuators, exploring their inner workings,…

[idexindia]

What is a Dosing Pump and How Does it Work?

In industries and other applications, a dosing pump is used as a specialised type of positive displacement pump to inject precise quantities of chemicals or substances into water flow or other mediums like gas and steam with accuracy and consistency for controlled chemical delivery purposes.

[shriankenterprise]

A Comprehensive Guide to Choosing the Right Proportional Valve

Proportional valves are perfect when adjusting flow rates while maintaining a steady inlet pressure. A proportional solenoid valve controls flow based on the input signal, similar to how a dimmer switch adjusts light intensity, unlike an on/off switch.

A Comprehensive Guide to Choosing the Right Proportional Valve: Learn how to select the ideal proportional valve for your needs.

[thmhuade]

Elevate Your System with Our Proportional Valve

Our advanced proportional valve offers precise flow control for enhanced performance in any application. Designed for reliability and efficiency, it ensures smooth operation and optimal results. Don't settle for less—experience superior quality today!

[carolinaclassictrucks]

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[covid-safer-hotties]

Also preserved in our archive

"No big deal." "Just a cold." "Back to normal."

The proportion of babies born with a congenital heart abnormality increased by 16 per cent after the first year of the pandemic, according to research at City St George's, University of London and published today in Ultrasound in Obstetrics and Gynecology.

Heart defects are the most common type of anomaly that develop before a baby is born, with around 13 babies diagnosed with a congenital heart condition every day in the UK and impacting one in 110 births globally . These include defects to the baby's heart valves, the major blood vessels in and around the heart, and the development of holes in the heart.

In over 18 million births, researchers analysed data from US birth certificates from the Centre of Disease Control and Prevention (CDC) between December 2016 and November 2022 to evaluate the effect of the pandemic on the number of babies born with a congenital heart defect.

They compared the number of babies born with a congenital heart condition every month before the Covid-19 pandemic (1st December 2016 to 30th November 2019) with those during the pandemic (1st December 2020 to 30th November 2022).

This data was then compared to the number of babies born with Down's Syndrome - a genetic condition not affected by the virus. This was to help ascertain if any differences observed might have been due to Covid-19, or if they were a result of other factors including limited access to antenatal services during the pandemic.

A total of 11,010,764 births before and 7,060,626 births during the pandemic were analysed. Data was adjusted to account for mother's BMI, diabetes and blood pressure before pregnancy, age, number of times they had given birth and the season in which prenatal care started.

The number of births with a congenital heart condition increased by 16% after the first year of the pandemic, with 65.4 cases per 100,000 live births compared to 56.5 per 100,000 births in the period studied before the pandemic.

The number of babies born with Down Syndrome did not change for the duration of the study, suggesting that the increase in fetal heart defects were not due to a disruption of health services.

Studying this large US dataset has revealed an unexpected picture for how the pandemic has affected the hearts of unborn babies, but we need to untangle the reasons for this link. We need to determine if the SARS-CoV-2 virus directly causes the development of fetal heart problems during pregnancy, and if so, how the virus makes these changes in the heart.

We don't have this type of data set available in the UK, but it's important to see if this pattern is seen in other parts of the world.

Covid-19 is still circulating and is easier to catch in the winter months. These results act as an important reminder for pregnant women to get their Covid-19 vaccinations to help protect themselves and their baby."

Professor Asma Khalil, lead author and Professor of Obstetrics and Maternal Fetal Medicine at City St George's, University of London

Source: City St George's, University of London

Journal reference: Khalil, A., et al. (2024). Congenital heart defects during COVID‐19 pandemic. Ultrasound in Obstetrics & Gynecology. doi.org/10.1002/uog.29126. obgyn.onlinelibrary.wiley.com/doi/epdf/10.1002/uog.29126

[valve3nthusiast]

(I've talked about Drift fucking crystals before right? Like there's no way that I haven't at least once right?)

How it all starts, of course, is with Rodimus making dirty jokes about some of the more... suspiciously shaped crystals in his collections, which Drift scolds him for. None of his crystals would be used like that! It's disrespectful!

Drift definitely doesn't spend the next couple of weeks staring at the ceiling of his room, furiously jacking off, while carefully avoiding looking at his collection. Or even thinking about it. Absolutely not. (Damn it, Rodimus)

So when he's next at an alien market and perusing the crystals and gemstones section, he definitely has no ulterior motive for buying an absurdly large harmonic quartz suspiciously cut and polished into the shape of a textured spike. Complete coincidence. (Listen, it was a really high-quality quartz for dirt cheap, he had to take that deal, ignore his bank account numbers)

And Drift is simply making a smart and tactical decision when he hides it in his subspace until he gets back to his room. Rodimus would probably never shut up about it, and maybe even steal it to try and do... lewd... acts with it! Truly, he is just looking out for the safety and dignity of all involved. Minimus would be proud

It's just... curiosity, that makes him take out the new quartz before he starts... "tending to himself," so he can compare it to his spike... only to see if it actually is that phallic!

The harmonic quartz is certainly pretty, shimmering with many vibrant colors. And large. And thick. And at the base of the center pillar, there are still some small crystalline formations, lovely and polished to a shine, but decently sharp enough to make you want to keep them away from anything... sensitive

A healthy dose of self-delusion really can't cover for the fact that once Drift realizes the crystal is so generously proportioned that it's nearly twice as big as his spike, his valve starts dripping. Any internal justifications of "academic interest" or "morbid curiosity" can't cover for the way he's now rubbing the blunt tip of the quartz across his glowing node and flushed valve folds

And, all right... maybe... he's been thinking about this more than he should. Maybe, getting it out of his system would make him stop. Maybe putting that blunt, unyielding crystal into his valve won't feel good at all, and he won't lie awake thinking about it anymore, so he should just put it in and be done with it-

Drift's loud moan shatters both the silence of his room and his hopes of not enjoying this, as he forces the massive crystal past the first caliper of his valve. It's somehow nothing like a spike, and yet better, his valve desperately clenching around the too-large quartz. The burn of his first caliper squeezing down on its unyielding, solid mass is exquisite. (It's possible there are some other things he has been avoiding admitting to himself, every time an injury made him revved up with charge that he did his best to ignore)

And, well. Maybe once Drift's collected himself, he ends up staring at the ceiling again, thinking about the empty ache in the rest of his valve, and the sunk cost fallacy, and how the rest of the crystal might feel if this is just the tip, and the merits of literally just saying "fuck it."

So he does. Fuck it, I mean. Vigorously, with great enthusiasm and some mild self-injury. His needy little valve was designed take the softer living metal of a spike, or something similar. The hard quartz he's forcing his valve open with is nothing like that at all. The sweet thrill of pain lights up his array with more charge than he ever really wants to self-reflect on

If Drift could even hear himself right now, he'd probably be embarrassed by the noises he's making. The aching burn of each new caliper he harshly pushes through has him moaning like a virgin taking their first spike. But he's too distracted by how fragging full he feels, one hand brutally pistoning the quartz into his abused valve, the other furiously rubbing circles on his anterior node

Fragging hell, when he finally manages to force the whole thing inside of him and grind the fat, blunt tip into his ceiling node, he shrieks like he's being fragging murdered, and accidentally overloads himself into unconsciousness

As Drift wakes up the next morning, still aching around the crystal he didn’t have the chance to pull out, valve lips scratched and bleeding from the rough edges at the base of his new favorite false spike, he looks at the ceiling and thinks: maybe I should start a new crystal collection...

(and, oh primus, if I get an infection from this, no one is ever going to let me live it down)

[mychlapci]

Constructicprowl but Prowl doesn’t understand how the gestalt bond works at first and so fails to hide how utterly aroused he gets when the others mech-handle, overpower, or generally dominate him. He’s sooo embarrassed by how everyone can tell just how good he feels, the heat increasing, no matter how much he scowls and shouts. In public, Prowl’s the boss. He decides what they’re doing, when, where, and sometimes even how. The mech’s a strategist and moving people around to fill needs and suit talents is his literal job. Once they’re behind closed doors, however…

The Constructicons like working the brattiness out of their boss the good old fashioned way: enough overloads to melt that sharp mind into a puddle. And Prowl is both deliciously powerless to stop them and embarrassingly eager to let it happen. He *loves* to be moved around like his input doesn’t matter, passed from mech to mech like a needy doll. Constantly full of spike, clinging to whoever’s carrying him around as they wear him like an accessory. They love fucking his wet, eager valve. And especially the noises it drags out of Prowl, squeaks and groans of pleasure as he’s jolted by another thrust.

One of their favorite games in spearing him on Long Haul’s spike and spreading his legs. Petting at his spike housing until it irises open for them to play with. They like teasing it with their fingers, cooing over how cute and small it is while Prowl tries to argue that it’s proportional or kick them away. Faceplates burning as he swears and snaps, each wriggle and kick only serving to remind him just how helpless and full of spike he is. They all know he doesn’t *really* mean it, not when Prowl’s clearly drowning in arousal on his end of the bond. Still, someone usually fucks his throat so he can’t get himself into even more trouble.

And all Prowl can do is take it, moaning and overloading as they take turns stroking and flicking his spike with their fingers. A cute little spike for their cute little boss. Just a toy to play with, utterly useless for fucking when his gestalt is so much bigger than him. Bonecrusher might let him try, just so they can laugh at Prowl’s attempt. It’s fine though, when he’s been reduced to angry tears and rutting they’ll pet and fuss over him when Bonecrusher bends him in half to show him how a “real” spike feels. And Prowl will be begging for more in no time, spike drooling petulantly against his belly.

At this point it’s not a matter of if Prowl gets pregnant but when. He still hasn’t figured out how to keep the gestalt bond closed.

hrghh the constructicons see right through him… He wants it. He can whine and kick and squirm but it’s undeniable that Prowl is hopelessly aroused by being lifted up and seated on the nearest spike, used like a toy… They know he likes it like that, with the fight involved, so he can play an innocent mech who was dragged into their berth by force, and it’s not his fault they’re groping him and fucking him until he’s a moaning puddle of squirt and transfluid. aaaaa I'm obsessed with them bullying his spike, laughing and jeering when he tries to fuck one of them… Prowl is almost as angry as he is aroused at that, but once again, they see right through him.

Yesss of course he would end up knocked up, the constructicons aren’t really keen on using any pesky protection, Prowl is their beloved spike-sleeve and boss, they can cum inside of him all they want <3 When his belly starts swelling, they just keep cooing at it, telling him how cute the little bump looks. Prowl can only blush, not even saying anything because he knows that they know how much it turned him on.

[phantombre]

Hey...

It's been a bit...

But I got something for you guys:

Hunted!

Hearing him speak made me imagine a Tarzan or Mowgli from The Jungle Book type character, so I saw this wildman. Though, somewhere down the line, I thought, "Hmmm... ...cat...". Heh.

Ironically, the reference I used for him crawling on all fours was the Hunter from Left 4 Dead. I wanted to keep natural human proportions but not make it look awkward. I have mixed feelings about Valve as a company nowadays (extremely mixed, in fact), but they do produce quality stuff once in a blue moon.

Oh, yeah, I ended up calling him "Frisky", mostly because of his flighty nature.

...but also cat....

Some other guys:

Narrator

Hero

Cheated "Jack"

[pddparthi]

Unveiling Precision: A Guide to Electrohydraulic Servo Valve Technology

Introduction: In the realm of industrial automation and high-performance machinery, electrohydraulic servo valves (EHSVs) reign supreme. These marvels of engineering bridge the gap between electrical control signals and the potent world of hydraulics. By translating subtle electrical commands into precise hydraulic fluid motion, EHSVs empower motion control systems with unmatched accuracy and…

[idexindia]

How to Choose the Right Metering Pump for Your Needs

A metering pump is a precise dosing device that delivers a specific volume of liquid within a specified time period. They are known to move fluids at an accurate volumetric flow rate. They’re commonly used for chemicals, solutions, or other liquids.

[spikezonebby]

https://www.tumblr.com/spikezonebby/766604402550341632/hnnnng-gotta-make-myself-fight-through-this-damn

May I ask specifically for Soundwave doing it to Shockwave?

Oh ho ho let's get that HOLE real talk this thought got away from me a bit so there's some finger sucking and ass play under the cut. That includes fingers, spike, AND rimming bby. Oh yeah and I'm inserting my nullified Shockwave hc in here too but it's nothing explicit, bruv just has no cock or puss. This also escalated into overloading untouched so enjoy!

I think Shockwave should have a thing for Soundwave's face under the mask. Maybe it's jealousy, maybe it's remembering his own face, maybe it's just the fact that Soundwave undoubtedly has some *luscious* dick sucking lips. Whatever it is, once Shockwave convinces him to take off the face mask the full horny comes out.

Brushing his thumb over Soundwave's soft bottom lip, pressing down and watching the protomesh give beneath him. Unlike Shocks, Sounders is pretty expressive beneath the mask. His expression screws up with a pout, he bites the inside of his cheek or the tip of his glossa. Shockwave hates (loves??) it. Soundwave's lips part and Shockwave takes the opportunity to savor the delightful wet warmth around his digits. He tries to picture biolights seated in the joints, protomesh instead of hard metal.

Empurata took more than just his face and his hands, and despite Lord Megatron's generosity (in equal proportion to your use), there were limits. No amount of donor parts would ever feel like his, and so Shockwave had to settle for using the one part of his that handed been destroyed by the Senate.

And Soundwave, despite his reputation for being quiet, knew how to use his tongue.

Soundwave's servos hold his thighs, drawing musical notations across the outside of one as the other slides up and presses along either side of Shocks' aft port. If he focuses, Shockwave can almost feel the pulse of arousal deep in the pit of his belly, right behind his permanently sealed valve cover and spike housing. Nothing was there. Nothing. Just empty slots where they once were. The blue boombox hums-- a rich sound without the mask synthesizer-- and a warm, humid breath brushes along his hole. Quickly followed by the swipe of a glossa, so brief it sends a shiver through his systems that not even shadowplay can supress.

"Stop stalling." He drones, gripping the edge of the table he laid belly-down upon with his good servo.

There was an electric buzz that haunted the air for a moment, the tell-tale sign of Soundwave trying to probe his mind and field. But shadowplay renders the field deaf and the vocalizer numb. He settles instead for pressing his glossa tighter to the iris of synthetic muscle and dutifully working at it.

Shockwave's body doesn't react to the ripples of liquid sin Sound's tongue pours over his sensory net, but he feels them still. Soundwave at least doesn't seem to mind a quiet lover. He loses himself to the moment, probably listening to music within his own mind as his tongue and lips work the purple mech open. Soon fingers join the fray and Shockwave's systems start to throw heat through his vents, hot enough to steam the air and make condensation sit on his plating.

Sounders pulls away, but not without leaving a long trail of solvent dripping down from his port all over the inside of his thighs. Shockwave's hole twitches, and Soundwave just leans in and swirls his tongue over the flushed protometal like it's the sweetest, filthiest treat.

"Stop stalling." Shockwave says again, his vocalizer clipped and his whining vents speaking more for his need. He can't overload from this, but it was close enough.

It takes an utterly embarrassing amount of energy to pull his pedes up beneath him, but he bows his back and tries to turn his helm to look over his shoulder.

He says it again, "Stop stalling." But Soundwave knows he means "Please frag me."

It is a logical enough conclusion.

So Soundwave hums again and takes the purple mech by the hips. There's a shoop-whiiiiiir of his plating retracting, then hefty weight of Sounder's spike sitting so enticingly plapping against his throbbing entrance.

"Stop stall--!?"

And then Soundwave lines himself up, and shoves himself to the hilt in one fell swoop. He's searingly hot, thicker than even Shockwave's digits, and he feels so good.

The quietest huffs escape his vents and Soundwave doesn't wait for him to adjust, he knows how loved and knows he likes it rough. Fingers slide up around his throat, not quite squeezing but it still takes Shockwave aback when the blue mech pulls him up off his front. Pulling his body taut against him, and Shockwave swears he can feel the boombox's massive spike pressing a bulge out against his abdomen.

"Query: Shockwave, cannot overload?"

If he's had a mouth Shockwave was certain he'd be beyond words. The lips in the side of his helm, brushing his audials, makes him shake minutely.

"Affirmative."

"Soundwave: Has an idea."

Before Shockwave can even question him, there's another click. His hand slides up to hold Soundwave's forearm, calculations running in the back of his processor for what the boombox could possibly be thinking. But his answer comes not as words but, vibration.

Soundwave's spike starts vibrating with such sudden, deep haste that Shockwave actually does gasp. It ruins him from his pedes to his processor, so deep he can feel it in his fuel pump. And with a shout his aft quivers around Soundwave, white blinding his vision and then spurts of thick, pink transfluid dumping into his chute. Never before had Shockwave felt so loose, wet, and properly used. His pedes give out, his optic flashes, and electricity crackles all along his body as his first overload in millions of years wrecked his body.

[carolinaclassictrucks]

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[whirligig-girl]

Thomas the Tank Engine & Friends aired on this day 40 years ago. Here's a portrait of the tank engine of the hour.

I usually draw Thomas as a sort of freelance design or "railway series" inspired design, with a few more realistic features and so on, if not as a straight up accurate or slightly modified E2.

But this drawing is a study of the Gauge 1 (1:32 scale) plastic prop built for Thomas the Tank Engine & Friends season 1. Proportions could be a little better; the wheels might be a little small and the boiler a little big. oh well.

A fun detail about the design is it's mostly using flat plastic-card and tubing of just a single radius. So the curve on the front footplate is actually the same curvature as the boiler. I believe the splashers are also the same diameter, but I'm not sure. The cab roof is probably slightly curved plastic-card. I'm not sure how the boiler and funnel are made, probably some amount of sculpting went into it. The chassis is a heavily modified german gauge 1 model built by Marklin, and the details like the vacuum brake pipe (the big tubing of the S1 version of the model looks way better to me than the like, floating pipe we see in later variants of the model), headlamp, and screw-link couplers are also taken from Marklin engines.

There's often discussion of what makes an engine a "RWS" version of an engine, but comparing the Gauge 1 prop to the first illustrations of Thomas from the Railway Series books, it's pretty much spot on. The double-whistle seems to be a slight misinterpretation of the safety valve assembly, and the lamp isn't especially accurate, and the font on the "1" is a little different, but it's basically like the drawing come to life. By comparison, it's usually the later versions of Thomas that people are attempting to evoke with "RWS" versions.

I also noticed that the lining appears to have like, white around it, almost like it's a print-out or something, rather than painted directly onto the model. So that's in my drawing too; and it actually kinda helps blend between the red lining and the blue paint a little better.