An improved heat responsive backseat for gate valves which includes a rotating valve stem (50) carried by a bonnet assembly (14) for actuation of a gate member (40). A fusible stem ring (126) supports the valve stem at an outer portion thereof (68) within a roller bearing chamber (56...
摘要: The invention is directed to a valve stem double backseat seal wherein the rising stem first engages a non-metallic radial seal and then axially engages the metal backseat shoulder of the valve bonnet.收藏 引用 批量引用 报错 分享 ...
The man was still weighted to the backseat. The muscles of his back, pronounced through a thin, damp shirt, seized with chills. Pulling up to the ... Gabriel,Louis - 《Subtropics》 被引量: 0发表: 2015年 Backseat assembly for expanding gate valve An expansion valve assembly for a rear...
The 110 % of this value will be 2477 psi. So your backseat test pressure will be 2477 psi. Backseat Test DurationThe valve test duration depends on the valve size as per API Std 598. The test duration is 15 seconds for valve less than 2 inch, 60 seconds for valves greater than 2 ...
Wafer Type Back Seat Handle Butterfly ValveProduct Description 1) Design and manufacture standards: A) Wafer and lug: API 609, DIN3354 B) Flange and weld: BS5155 / EN5982) Inspection and test standards: API 598, DIN3230, BS51463) F-to-F: A) Wafer and lug: API609, ...
OF THE DISCLOSURE A valve, including a body, a stem and a backseat characterized in that the backseat is secured in its operational position within the body by a locking means engagable therewith and with the body, a rotational interlock is provided between the locking means and the body ...
Due to nostalgia and the addition of "Backseat Gamer" into the Urban Dictionary, I re-purchased the domain in 2009 with the full intent to re-create the winning formula of years gone past (actually the old site was a pile of shit looking back at it but enough on that).Unfortunately ...
of the segment; a sealing surface that is formed on the bonnet; and a sealing surface that is formed on the stem and engages with the sealing surface formed on the bonnet, wherein when the gate valve is in the fully open position, a metal sheet is formed between the sealing surfaces ...
Irrigation water filtration backwash valve Design for automatic back flush in water filtration system for irrigation and water treatment Especially for sand media filter & automatic self-cleaning disc filter Port size: 2", 3", 4" Hydraulic operation port: 1/8"-1/4" ...
An expansion valve assembly for a rear seat, which is capable of sufficient force to cause the shutter and the shutter move relative to each other in the fully open position in the housing passage and the air gap isolated from each other. The rear seat assembly comprising: a housing includin...