【Q&A Question 038】2017.02.07
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This post was last edited by 955559 on 2017-7-21 21:45. [Q&A Question No. 038] 2017.02.07: What is the difference between cold oil pumps and hot oil pumps? The reference answers will be visible after responding; points are awarded by identifying the key points. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) ① An oil pump is considered a cold oil pump when the operating temperature is below 200°C, and a hot oil pump when the temperature is above 200°C. ②Typical hot oil pump sealing mechanisms are filled with seal oil, whereas cold oil pumps are not. ③The clearance of the ring at the hot oil pump is larger, while it is smaller at the cold oil pump. ④Hot oil pumps are usually made of carbon steel or alloy steel, while cold oil pumps are made of cast iron. ⑤Hot oil pumps need to be preheated before starting, while cold oil pumps do not. ⑥The supports, bearing housings, and mechanical seals of the hot oil pump all require water cooling, whereas this is not necessary for the cold oil pump. Petrochemical Area – “Creative Ideas for Energy Saving” event: http://bbs.hcbbs.com/thread-1666758-1-1.html The New Normal Cup – Voting for the top 10 members of HaiChuan in 2016 is now underway; vote for the member you care most about (please cast your valuable vote for the members in the Petrochemical Area). http://bbs.hcbbs.com/thread-1667649-1-1.html Summary post of Q&A questions for 2017 (updates available now). http://bbs.hcbbs.com/thread-1657793-1-1.html Summary post of daily questions for 2017 (updates available now). http://bbs.hcbbs.com/thread-1657794-1-1.html Summary post of Q&A questions from 2016 (updates completed). http://bbs.hcbbs.com/thread-1597792-1-1.html Third-phase selection of outstanding management members at HaiChuan. http://bbs.hcbbs.com/thread-1655902-1-1.html Petrochemical Area – “Creative Ideas for Energy Saving” event: http://bbs.hcbbs.com/thread-1666758-1-1.html Xiaomi phones are up for grabs. Summary post collecting chemical industry technical materials from the “Petrochemical Section”. http://bbs.hcbbs.com/thread-1654603-1-1.html Many prizes are waiting for you (Source: HaiChuan Chemical Forum)
①Pumps operating at temperatures below 200°C are considered cold-axis pumps, while those operating at temperatures above 200°C are hot-axis pumps. ②Typical hot oil pump sealing mechanisms are filled with seal oil, whereas cold oil pumps are not. ③The clearance of the hot oil pump ring is large. The cold oil pump is smaller. ④Hot oil pumps are usually made of carbon steel or alloy steel, while cold oil pumps are made of cast iron. ⑤Hot oil pumps need to be preheated before starting, while cold oil pumps do not. ⑥The supports, bearing housings, and mechanical seals of the hot oil pump all require water cooling, whereas this is not necessary for the cold oil pump.
①Oil pumps used at temperatures below 200°C are considered cold oil pumps, while those used at temperatures above 200°C are hot oil pumps. ②Typical hot oil pump sealing mechanisms are filled with seal oil, whereas cold oil pumps are not. ③The clearance of the hot oil pump ring is large. The cold oil pump is smaller. ④Hot oil pumps are usually made of carbon steel or alloy steel, while cold oil pumps are made of cast iron. ⑤Hot oil pumps need to be preheated before starting, while cold oil pumps do not. ⑥The supports, bearing housings, and mechanical seals of the hot oil pump all require water cooling, whereas this is not necessary for the cold oil pump.
①Pumps operating at temperatures below 200°C are considered cold-axis pumps, while those operating at temperatures above 200°C are hot-axis pumps. ②Typical hot oil pump sealing mechanisms are filled with seal oil, whereas cold oil pumps are not. ③The clearance of the hot oil pump ring is large. The cold oil pump is smaller. ④Hot oil pumps are usually made of carbon steel or alloy steel, while cold oil pumps are made of cast iron. ⑤Hot oil pumps need to be preheated before starting, while cold oil pumps do not. ⑥The supports, bearing housings, and mechanical seals of the hot oil pump all require water cooling, whereas this is not necessary for the cold oil pump.
①Pumps operating at temperatures below 200°C are considered cold-axis pumps, while those operating at temperatures above 200°C are hot-axis pumps. ②Typical hot oil pump sealing mechanisms are filled with seal oil, whereas cold oil pumps are not. ③The clearance of the hot oil pump ring is large. The cold oil pump is smaller. ④Hot oil pumps are usually made of carbon steel or alloy steel, while cold oil pumps are made of cast iron. ⑤Hot oil pumps need to be preheated before starting, while cold oil pumps do not. ⑥The supports, bearing housings, and mechanical seals of the hot oil pump all require water cooling, whereas this is not necessary for the cold oil pump.
①Pumps operating at temperatures below 200°C are considered cold-axis pumps, while those operating at temperatures above 200°C are hot-axis pumps. ②Typical hot oil pump sealing mechanisms are filled with seal oil, whereas cold oil pumps are not. ③The clearance of the hot oil pump ring is large. The cold oil pump is smaller. ④Hot oil pumps are usually made of carbon steel or alloy steel, while cold oil pumps are made of cast iron. ⑤Hot oil pumps need to be preheated before starting, while cold oil pumps do not. ⑥The supports, bearing housings, and mechanical seals of the hot oil pump all require water cooling, whereas this is not necessary for the cold oil pump.
1. The supports, bearing housings, and mechanical seals of the hot oil pump all require water cooling, whereas this is not necessary for the cold oil pump. The pump materials differ: hot oil pumps are made of carbon steel or alloy steel, with their pump bearings cooled by circulating water, whereas cold oil pumps are made of cast iron, and their pump bearings do not require cooling. 2. The hot oil pump needs to be preheated before starting, but this is not necessary for the cold oil pump. Pump models are denoted differently: hot oil pumps are indicated by the letter R, while cold oil pumps are indicated by J. 3. Hot oil pumps are usually made of carbon steel or alloy steel, while cold oil pumps can be constructed from cast iron. The pump medium temperature varies: pumps with temperatures below 200°C are cold oil pumps (20–200°C), while those with temperatures above 200°C are hot oil pumps (200–400°C). 4. The clearance of the hot oil pump ring is large. The cold oil pump is smaller. In standby mode, the hot oil pump needs to be preheated, while the cold oil pump does not.
①Pumps operating at temperatures below 200°C are considered cold-axis pumps, while those operating at temperatures above 200°C are hot-axis pumps. ②Typical hot oil pump sealing mechanisms are filled with seal oil, whereas cold oil pumps are not. ③The clearance of the hot oil pump ring is large. The cold oil pump is smaller. ④Hot oil pumps are usually made of carbon steel or alloy steel, while cold oil pumps are made of cast iron. ⑤Hot oil pumps need to be preheated before starting, while cold oil pumps do not. ⑥The supports, bearing housings, and mechanical seals of the hot oil pump all require water cooling, whereas this is not necessary for the cold oil pump.
Pumps with a medium temperature above 200 degrees are hot oil pumps, while those with a temperature below 200 degrees are cold oil pumps； The hot oil pump needs to be preheated, while the cold oil pump does not
①Oil pumps used at temperatures below 200°C are considered cold oil pumps, while those used at temperatures above 200°C are hot oil pumps. ②Typical hot oil pump sealing mechanisms are filled with seal oil, whereas cold oil pumps are not. ③The clearance of the ring at the hot oil pump is larger, while it is smaller at the cold oil pump. ④Hot oil pumps are usually made of carbon steel or alloy steel, while cold oil pumps are made of cast iron. ⑤Hot oil pumps need to be preheated before starting, while cold oil pumps do not. ⑥The supports, bearing housings, and mechanical seals of the hot oil pump all require water cooling, whereas this is not necessary for the cold oil pump.
①Pumps operating at temperatures below 200°C are considered cold-axis pumps, while those operating at temperatures above 200°C are hot-axis pumps. ②Typical hot oil pump sealing mechanisms are filled with seal oil, whereas cold oil pumps are not. ③The clearance of the hot oil pump ring is large. The cold oil pump is smaller. ④Hot oil pumps are usually made of carbon steel or alloy steel, while cold oil pumps are made of cast iron. ⑤Hot oil pumps need to be preheated before starting, while cold oil pumps do not. ⑥The supports, bearing housings, and mechanical seals of the hot oil pump all require water cooling, whereas this is not necessary for the cold oil pump.