GRLA-1/8-QS-8-RS-B162966節(jié)流閥/FESTO單向閥
FESTO節(jié)流閥的性能要求是節(jié)流閥·流量調(diào)節(jié)范圍大,流量一壓差變化平滑;·內(nèi)泄漏量小,若有外泄漏油口,外泄漏量也要??;·調(diào)節(jié)力矩小,動(dòng)作靈敏。節(jié)流閥的外形結(jié)構(gòu)與截止閥并無區(qū)別,只是它們啟閉件的形狀有所不同。節(jié)流閥的啟閉件大多為圓錐流線型,通過它改變通道截面積而達(dá)到調(diào)節(jié)流量和壓力。節(jié)流閥供在壓力降極大的情況下作降低介質(zhì)壓力之用。介質(zhì)在節(jié)流閥瓣和閥座之間流速很大,以致使這些零件表面很快損壞-即所謂汽蝕現(xiàn)象。為了盡量減少汽蝕影響,閥瓣采用耐汽蝕材料(合金鋼制造)并制成*角為140~180的流線型圓錐體,這還能使閥瓣能有較大的開啟高度,一般不推薦在小縫隙下節(jié)流。節(jié)流閥是通過改變節(jié)流截面或節(jié)流長度以控制流體流量的閥門。將節(jié)流閥和單向閥并聯(lián)則可組合成單向節(jié)流閥。節(jié)流閥和單向節(jié)流閥是簡易的流量控制閥,在定量泵液壓系統(tǒng)中,節(jié)流閥和溢流閥配合,可組成三種節(jié)流調(diào)速系統(tǒng),即進(jìn)油路節(jié)流調(diào)速系統(tǒng)、回油路節(jié)流調(diào)速系統(tǒng)和旁路節(jié)流調(diào)速系統(tǒng)。
FESTO節(jié)流閥和止回閥功能的多用閥門。它的結(jié)構(gòu)形式與節(jié)流閥相似,但閥桿與閥瓣不是固定聯(lián)接。當(dāng)閥桿下降將閥瓣緊壓在閥座上時(shí),起節(jié)流閥作用;閥桿上升后,則起止回閥作用。在同時(shí)需要安裝節(jié)流閥(或閘閥)和止回閥的管道上(如水泵的出口端),或在安裝位置受到限制的場所(如船舶),使用截止止回閥可節(jié)約安裝費(fèi)用和空間位置。節(jié)流閥是使用zui廣泛的一種閥門,它之所以廣受歡迎,是由于開閉過程中密封面之間摩擦力小,比較耐用,開啟高度不大,制造容易,維修方便,不僅適用于中 低壓,而且適用于高壓。節(jié)流閥的閉合原理是,依靠閥杠壓力,使閥瓣密封面與閥座密封面緊密貼合,阻止介質(zhì)流通。 節(jié)流閥只許介質(zhì)單向流動(dòng),安裝時(shí)有方向性。節(jié)流閥的結(jié)構(gòu) 長度大于閘閥,同時(shí)流體阻力大,長期運(yùn)行時(shí),密封可靠性 不強(qiáng)。節(jié)流閥屬于強(qiáng)制密封式閥門,所以在閥門關(guān)閉時(shí),必須向閥瓣施加壓力,以強(qiáng)制密封面不泄漏。當(dāng)介質(zhì)由閥瓣下方進(jìn)入閥門時(shí),操作力所需要克服的阻力,是閥桿和填料的摩擦力與由介質(zhì)的壓力所產(chǎn)生的推力,關(guān)閥門的力比開閥門的力大,所以閥桿的直徑要大,否則會(huì)發(fā)生閥桿頂彎的故障。近年來,從自密封的閥門出現(xiàn)后,節(jié)流閥的介質(zhì)流向就改由閥瓣上方進(jìn)入閥腔,這時(shí)在介質(zhì)壓力作用下,關(guān)閥門的力小,而開閥門的力大,閥桿的直徑可以相應(yīng)地減少。
GRLA-1/8-QS-8-RS-B162966節(jié)流閥/FESTO單向閥
2003/10 – Subject to change – Products 2004/2005
2/5.6-1
FESTO節(jié)流閥和單向節(jié)流閥
FESTO單向節(jié)流閥,
用于控制進(jìn)氣和排氣流量
節(jié)流閥,不帶單向功能
適用于螺紋M3...G?和氣管外徑3...12 mm
工程塑料和金屬結(jié)構(gòu)
不含銅和聚四氟乙烯
耐腐蝕結(jié)構(gòu)
性能要求
對(duì)FESTO節(jié)流閥的性能要求是:
·費(fèi)斯托流量調(diào)節(jié)范圍大,流量一壓差變化平滑;
·內(nèi)泄漏量小,若有外泄漏油口,外泄漏量也要小;
·調(diào)節(jié)力矩小,動(dòng)作靈敏。
費(fèi)斯托節(jié)流閥(Choke valve)的外形結(jié)構(gòu)與截止閥并無區(qū)別,只是它們啟閉件的形狀有所不同。節(jié)流閥的啟閉件大多為圓錐流線型,通過它改變通道截面積而達(dá)到調(diào)節(jié)流量和壓力。節(jié)流閥供在壓力降極大的情況下作降低介質(zhì)壓力之用。
介質(zhì)在節(jié)流閥瓣和閥座之間流速很大,以致使這些零件表面很快損壞-即所謂氣蝕現(xiàn)象。為了盡量減少氣蝕影響,閥瓣采用耐氣蝕材料(合金鋼制造)并制成*角為140~180的流線型圓錐體,這還能使閥瓣能有較大的開啟高度,一般不推薦在小縫隙下節(jié)流。
特點(diǎn)
1、構(gòu)造較簡單,便于制造和維修,成本低。
2、調(diào)節(jié)精度不高,不能作調(diào)節(jié)使用。
3、密封面易沖蝕,不能作切斷介質(zhì)用。
4、密封性較差。
分類
FESTO節(jié)流閥按通道方式可分為直通式和角式兩種;按啟閉件的形狀分,有針形、溝形和窗形三種。
可調(diào)節(jié)節(jié)流閥:閥針和閥芯采用硬質(zhì)合金制造,產(chǎn)品按API6A標(biāo)準(zhǔn)設(shè)計(jì),具有耐磨、耐沖刷性能。主要用于井口采油(氣)樹設(shè)備,
滑套式節(jié)流閥:閥芯采用低噪音平衡型結(jié)構(gòu),開啟輕便,產(chǎn)品按API6A標(biāo)準(zhǔn)設(shè)計(jì),閥芯表面覆蓋碳化鎢,適合于有閃蒸、高壓差,高壓力,空化等條件苛刻的場合,使用壽命長,流量調(diào)節(jié)精度大大提高。適用于石油,天然氣,化工,煉油,水電等行業(yè)。
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Bosch Rexroth
CDT3MP5/25/18/115Z2X/B11HHDTWW
Univer K2000500400
Wandfluh ARV6/P-B
GE Druck DPI832
GE Druck DPI880
Norelem 21230-A025*0635
Norelem 21230-4000
Hydac N15DM010
Hydac N15DM010
Hydac HDA4744-A-006-000
Hydac HDA4744-A-016-000
Hydac HDA4845-B-250-000
Hydac HDA4445-B-400-000
Roemheld 9740-049
Vickers ST307-V2-350-B
Baumer Bourdon PBMN
Bosch Rexroth PSG6130.00AS,Nr.1070086613
Murr 3000-16023-2100010.24 VDC
Pilz #751109 24VDC
Pilz #751104 24VDC
Gefran 1000-R0-1R-0-1
EprolEmerson PR6423/002一01
EprolEmerson CON041
Micro Epsiloon Eltrotec CLS-K-63
KUbler 8.5020.234A2500.0080
TR Electronic 110-02679
Oilgear pfwj-025-a1uv-lsay-f-100nn
numatics s2am-03110-aaa0
bucher m-3326-0121
deublin 557-050-198-221
fairchild 10294bp
parker cbe4ma2u34ac
parker cdd4ma1u14ac
mightyline agv tape-3x100
ongaro 12427 24V
swagelok ss-4f-90
K-TRON 0000036186fa
nason xp-19a-50f/esau
nason xp-19a-50f
antunes 8021206255
american 1500bfts-4.00
dytran 2200v1
ge tf-2r-t40-1-1-0-0-0
wilkerson 108-02-kk00
寶德Burkert 211746
寶德Burkert 227768
BUHLER布勒 NT63-K-VA-M3/520
WALTHER LP-006-2-D0614-11-2
WALTHER LP-004-2-WR010-11-2
WALTHER LP-006-0-WR513-11-2
WALTHER MD-007-0-WR021-13-2-G1/2
WALTHER MD-007-2-WR021-19-2-G1/2
WALTHER LP-007-2-WR017-13-2 G3/8A
WALTHER LP-007-1-S1018-13-2(DN7/PN50M18*1.5)
WALTHER MD-007-0-WR021-13-2(DN7/PN250/G1/2A)
Pister 092.08DD-SO-N24V DIN 1
寶德Burkert 046018
HYDAC EVS3104-A-0300-000
GEFRAN LT-F-0175-S
TR LA66K ART.NR:312-01327
Burkert 227236
Eltra意爾創(chuàng) ER40B500Z5/28P6X6PR
Eltra意爾創(chuàng) ERA150S8/24L6P
NORGREN 8026675
WAIRCOM CLR8 MAX.12bar
BAUSER 629A.2
AVENTICS 0821303504
AVENTICS R412004800
AVENTICS 0830100487
AVENTICS 0822123001
AVENTICS 5811110100
RICHTER BVA 150LBS PFA
Burkert 00567223
TR ArtNr:219-00773
HYDAC HDA4745-A-400-000
PULSOTRONIC DLA640-48/10 90867300008
RICKMEIER R35/31.5
Burkert 178354
SCHONBUCH IX050808
VOITH 150031411 80017-011 0-160bar&63G1/4RS
PHOENIX MINI-PS-100-240AC/2X15DC/1
Draeger SENSING HEAD SE EX HT M DD P/26812720
Novotechnik MUP110-1
Mobrey SMN1
TR aev70m-00103