ʻO nā coefficients kahe valve mana (Cv, Kv a me C) o nā ʻōnaehana ʻāpana like ʻole he mau valves mana ma lalo o ke kaomi ʻokoʻa paʻa, ʻo ka nui o ka wai e kaʻapuni ana i loko o kahi anakahi o ka manawa ke wehe piha ʻia ka valve mana, Cv, Kv a me C aia kahi pilina ma waena o Cv = 1.156Kv, Cv = 1.167C. Ke kaʻana like nei kēia ʻatikala i ka wehewehe ʻana, ka ʻāpana, ka hoʻololi ʻana a me ke kaʻina hana hoʻopuka piha o Cv, Kv a me C.
1, Wehewehena o ke koina kahe
ʻO ke kahe ʻana o ka valve mana he wai kikoʻī ma kahi mahana kikoʻī, i ka wā e pau ai ka valve no ke kaomi ʻokoʻa o ka ʻāpana, ʻo ka nui o ka wai e kahe ana ma o ka valve mana i loko o kahi anakahi manawa, me ka hoʻohana ʻana i kahi ʻōnaehana ʻokoʻa o nā anakahi i ka wā he mau ʻano like ʻole o ka hōʻike ʻana.
Ka wehewehe ʻana o ke koina kahe C
Hāʻawi ʻia i ke kaha ʻana, ʻo ka mahana o ka wai he 5-40 ℃, ʻo ka ʻokoʻa o ke kaomi valve ma waena o nā wēlau ʻelua he 1kgf/cm2, ʻo ka nui o ke kahe ʻana ma o ka valve i kēlā me kēia hola (i hōʻike ʻia ma m3). ʻO C ke coefficient kahe o ka metric maʻamau, ua hoʻohana ʻia ko mākou ʻāina i ka wā ma mua no ka manawa lōʻihi, i ʻike mua ʻia ʻo ka hiki ke kaʻapuni o C. ʻO ke coefficient kahe C ke coefficient kahe o ka metric maʻamau.
② Ka wehewehe ʻana o ke koina kahe Kv
Ma muli o ke kaha ʻana, ʻo ka ʻokoʻa o ke kaomi ma waena o nā wēlau ʻelua o ka valve he 102kPa, ʻo ka mahana o ka wai he 5-40 ℃, ʻo ka nui o ka wai e kahe ana ma o ka valve kaohi i kēlā me kēia hola (i hōʻike ʻia ma m3). ʻO kv ka ʻōnaehana honua o nā anakahi kahe coefficient.
③ Wehewehena o ke koina kahe Cv
ʻO ka nui o ka wai ma ka mahana o 60°F e kahe ana ma o kahi valve hoʻoponopono i kēlā me kēia minuke (i hōʻike ʻia ma nā galani US US gal) no kahi hahau i hāʻawi ʻia me kahi kaomi ʻokoʻa o 1lb/in2 ma kēlā me kēia hopena o ka valve. ʻO Cv ke coefficient kahe imperial.
2. Ka hoʻopuka ʻana i nā haʻilula no nā ʻōnaehana anakahi like ʻole
①Ka mana kaapuni C haʻilula a me nā anakahi
当γ/γ0=1，Q=1m3/h，△P=1kgf/cm2时，如C定义为1，则N=1。则流通能力C的公式及单位如下：
Ke γ/γ0=1, Q=1m3/h, △P=1kgf/cm2, inā ua wehewehe ʻia ʻo C he 1, a laila ʻo N=1. ʻO ke ʻano hana a me ke anakahi o ka mana o ke kaʻapuni ʻana o C penei:
Ma ke ʻano haʻilula, ʻo C ka mana o ke kaʻapuni; ʻo ke anakahi Q he m3/h; ʻo γ/γ0 ke kaumaha kikoʻī; ʻo ke anakahi △P he kgf/cm2.
② Ka helu ʻana o ke koina kahe Cv a me ke anakahi
Ke wehewehe ʻia ʻo ρ/ρ0, Q=1USgal/min, ∆P=1lb/in2, a inā ua wehewehe ʻia ʻo Cv=1, a laila ʻo N=1. ʻO ke ʻano hana a me nā anakahi o ke koina kahe ʻo Cv penei:
kahi ʻo Cv ke koina kahe; aia ʻo Q ma USgal/min; ʻo ρ/ρ0 ka nui kikoʻī; a aia ʻo ∆P ma lb/in2.
③ Ka helu ʻana o ke koina kahe Kv a me ke anakahi
I ka wā ʻo ρ/ρ0=1, Q=1m3/h, ΔP=100kPa, inā ʻo Kv=1, a laila ʻo N=0.1. ʻO ke ʻano a me ke anakahi o ke koina kahe ʻo Kv penei:
kahi ʻo Kv ke koina kahe; aia ʻo Q ma m3/h; ʻo ρ/ρ0 ka nui kikoʻī; aia ʻo ΔP ma kPa.
3, Hoʻololi ʻana o ka mana holo C, ke koina kahe Kv, ke koina kahe Cv
① ka pilina o ke koina kahe ʻo Cv a me ka mana kahe C
kahi i ʻike ʻia ai aia ʻo Q ma USgal/min; ʻo ρ/ρ0 ka nui kikoʻī; a ʻo ∆P ma lb/in2.
I ka wā ʻo C=1, Q=1m3/h, γ/γ0=1 (ʻo ia hoʻi, ρ/ρ0=1), a me ∆P=1kgf/cm2, ʻo ke pani ʻana i ke ʻano Cv me ke kūlana o C=1 penei:
Mai nā helu ʻana, ʻike mākou he like ʻo C=1 a me Cv=1.167 (ʻo ia hoʻi, Cv=1.167C).
② Hoʻololi ʻana o Cv a me Kv
Ke Kv = 1, Q = 1m3 / h, ρ / ρ0 = 1, △ P = 100kPa e pani ana i ka haʻilula Cv no ka hoʻololi ʻana o ka ʻāpana:
ʻO ia hoʻi, ua like ʻo Kv = 1 me Cv = 1.156 (ʻo ia hoʻi, Cv = 1.156Kv).
Ma muli o kekahi ʻike a me nā laʻana o ka mana kahe o ka valve mana C, ka coefficient kahe Kv a me ka ʻōnaehana kahe Cv ʻekolu nele o ke kaʻina hana derivation, ka hoʻohana ʻana i ka maʻalahi e hana i ka huikau. ʻO Changhui Instrumentation C, Kv, Cv mai ka wehewehe ʻana, ka noi ʻana o ka ʻāpana a me ka pilina ma waena o nā mea ʻekolu e wehewehe ʻia, e kōkua i nā mea hoʻolālā ʻenekinia i ke kaʻina hana o ka hoʻoponopono ʻana i ke koho valve a me ka helu ʻana o nā ʻano hōʻike like ʻole o nā coefficient kahe (C, Kv, Cv) no ka hoʻololi a me ka hoʻohālikelike, e hoʻomaʻamaʻa i ke koho ʻana o nā valves hoʻoponopono ma mua o ke koho ʻana.
ʻO nā waiwai CV o nā kiwikā pepeke o Tianjin Zhongfa Valve penei, inā pono, e ʻoluʻolu e nānā.